A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].
Organic compounds that contain silicon as an integral part of the molecule.
Inorganic compounds that contain silicon as an integral part of the molecule.
Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules such as antibodies that will bind to proteins and other substances.
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
Electrical devices that are composed of semiconductor material, with at least three connections to an external electronic circuit. They are used to amplify electrical signals, detect signals, or as switches.
A rare metal element with a blue-gray appearance and atomic symbol Ge, atomic number 32, and atomic weight 72.63.
A hydrated form of silicon dioxide. It is commonly used in the manufacture of TOOTHPASTES and as a stationary phase for CHROMATOGRAPHY.
The study, control, and application of the conduction of ELECTRICITY through gases or vacuum, or through semiconducting or conducting materials. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Compounds similar to hydrocarbons in which a tetravalent silicon atom replaces the carbon atom. They are very reactive, ignite in air, and form useful derivatives.
Characteristics or attributes of the outer boundaries of objects, including molecules.
Energy transmitted from the sun in the form of electromagnetic radiation.
Any of a variety of procedures which use biomolecular probes to measure the presence or concentration of biological molecules, biological structures, microorganisms, etc., by translating a biochemical interaction at the probe surface into a quantifiable physical signal.
Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
Methods of creating machines and devices.
A class of devices combining electrical and mechanical components that have at least one of the dimensions in the micrometer range (between 1 micron and 1 millimeter). They include sensors, actuators, microducts, and micropumps.
Manufacturing technology for making microscopic devices in the micrometer range (typically 1-100 micrometers), such as integrated circuits or MEMS. The process usually involves replication and parallel fabrication of hundreds or millions of identical structures using various thin film deposition techniques and carried out in environmentally-controlled clean rooms.
A broad family of synthetic organosiloxane polymers containing a repeating silicon-oxygen backbone with organic side groups attached via carbon-silicon bonds. Depending on their structure, they are classified as liquids, gels, and elastomers. (From Merck Index, 12th ed)
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
Inorganic or organic compounds that contain sulfur as an integral part of the molecule.
Hafnium. A metal element of atomic number 72 and atomic weight 178.49, symbol Hf. (From Dorland, 28th ed)
The common name for the phylum of microscopic unicellular STRAMENOPILES. Most are aquatic, being found in fresh, brackish, and salt water. Diatoms are noted for the symmetry and sculpturing of their siliceous cell walls. They account for 40% of PHYTOPLANKTON, but not all diatoms are planktonic.
A plant genus of the family POACEAE that contains the Poa p Ia allergen and allergen C KBGP.
The design or construction of objects greatly reduced in scale.
Organic compounds that have a relatively high VAPOR PRESSURE at room temperature.
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
Small holes of nanometer dimensions in a membrane, that can be used as single molecule detectors. The pores can be biological or synthetic.
Microdevices that combine microfluidics technology with electrical and/or mechanical functions for analyzing very small fluid volumes. They consist of microchannels etched into substrates made of silicon, glass, or polymer using processes similar to photolithography. The test fluids in the channels can then interact with different elements such as electrodes, photodetectors, chemical sensors, pumps, and valves.
Products or parts of products used to detect, manipulate, or analyze light, such as LENSES, refractors, mirrors, filters, prisms, and OPTICAL FIBERS.
Fleshy and reddish outgrowth of skin tissue found on top of the head, attached to the sides of the head, and hanging from the mandible of birds such as turkeys and chickens.
The misinterpretation of a real external, sensory experience.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Any chemical species which acts as an electron-pair donor in a chemical bonding reaction with a LEWIS ACID.
Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed)
The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A high-molecular-weight polymeric elastomer derived from the milk juice (LATEX) of HEVEA brasiliensis and other trees and plants. It is a substance that can be stretched at room temperature to at least twice its original length and after releasing the stress, retract rapidly, and recover its original dimensions fully.
Polymers of silicone that are formed by crosslinking and treatment with amorphous silica to increase strength. They have properties similar to vulcanized natural rubber, in that they stretch under tension, retract rapidly, and fully recover to their original dimensions upon release. They are used in the encapsulation of surgical membranes and implants.
Organic siloxanes which are polymerized to the oily stage. The oils have low surface tension and density less than 1. They are used in industrial applications and in the treatment of retinal detachment, complicated by proliferative vitreoretinopathy.
Laws and regulations, pertaining to the field of pharmacy, proposed for enactment or enacted by a legislative body.
A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.
Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)
A polymer prepared from polyvinyl acetates by replacement of the acetate groups with hydroxyl groups. It is used as a pharmaceutic aid and ophthalmic lubricant as well as in the manufacture of surface coatings artificial sponges, cosmetics, and other products.
A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
The use of a treatment material (tissue conditioner) to re-establish tone and health to irritated oral soft tissue, usually applied to the edentulous alveolar ridge.
A genus of gram-positive, anaerobic bacteria in the family Thermoanaerobacteriaceae. Cultures consist of rods interspersed with coccoid cells.
A codon that directs initiation of protein translation (TRANSLATION, GENETIC) by stimulating the binding of initiator tRNA (RNA, TRANSFER, MET). In prokaryotes, the codons AUG or GUG can act as initiators while in eukaryotes, AUG is the only initiator codon.

Influence of fibre length, dissolution and biopersistence on the production of mesothelioma in the rat peritoneal cavity. (1/180)

A range of respirable man-made mineral fibres were tested for evidence of carcinogenicity by injection into the peritoneal cavity of male SPF Wistar rats; and differences in carcinogenicity were related to the dimensions and biopersistence of the injected fibres. The fibres tested included an amosite asbestos, a silicon carbide whisker, a special purpose glass microfibre, and a range of other man-made vitreous fibres (MMVFs) and refractory ceramic fibres (RCFs) from the TIMA fibre repository. The injected dose of each was designed as the estimated mass required to contain 10(9) fibres > 5 microns in length, as determined by optical microscopy. The numbers of long fibres (> 15 microns) contained in these doses ranged across fibres from 0.1 x 10(9) to 0.8 x 10(9) fibres; the number of long fibres thinner than 0.95 micron ranged from 0.015 x 10(9) to 0.4 x 10(9). The treatment groups contained between 18 and 24 animals. Animals were killed when they showed signs of debilitation. At autopsy, the diagnosis of mesothelioma was usually obvious macroscopically. Otherwise, histological examination of peritoneal organs was used to search for early tumour development. Judged by median survival time, four of the fibre types, in the doses administered, presented higher mesothelioma activity than amosite asbestos. The other fibres tested were less carcinogenic than the amosite. Only a ceramic material derived by extreme heating to simulate the effect of furnace or oven conditions, produced no mesotheliomas. Attempts were made, using regression models, to relate these differences to fibre dimensions and to measures of durability from separate experiments. The results pointed principally to a link with the injected numbers of fibres > 20 microns in length and with biopersistence in the rat lung of fibres longer than 5 microns. Improved quantification of the relative importance of fibre dimensions and biopersistence indices requires experimentation with a range of doses.  (+info)

Depletion of glutathione and ascorbate in lung lining fluid by respirable fibres. (2/180)

OBJECTIVE: The use of synthetic vitreous fibres has increased along with a decline in the utilisation of asbestos. There remains concern that these synthetic fibres pose a health risk to workers because of the generation of respirable fibres which can enter the lung and cause adverse health effects. An improved understanding of the mechanism of fibre pathogenicity should allow more rational short-term testing regimes for new fibres as they are developed. We hypothesised that carcinogenic fibres have greater free radical activity compared with non-carcinogenic fibres and that they contribute to disease by causing oxidative stress in the lung. We examined a panel of respirable fibres, designated as being carcinogenic or non-carcinogenic based on previous animal studies for ability to deplete antioxidants from lung lining fluid. METHODS: On the basis of inhalation studies, a panel of fibres was divided into three carcinogenic fibres-amosite asbestos, silicon carbide, and refractory ceramic fibre 1 (RCF1) and three non-carcinogenic fibres-man-made vitreous fibre 10 (a glass fibre MMVF10), Code 100/475 glass fibre, and refractory ceramic fibre 4 (RCF4). We measured the levels of glutathione (GSH) and ascorbate, two antioxidants present in lung lining fluid (LLF) after fibre treatment. All of the experiments were carried out at equal fibre number. RESULTS: Fibres had the ability to deplete both GSH and ascorbate from both LLF and pure solutions, an effect which was fibre number dependent. The greatest depletion of antioxidants was observed with the two non-carcinogenic glass fibres, and this effect was observed when A549 lung epithelial cells were treated with fibres. CONCLUSIONS: Our results show that antioxidant depletion in cell free solution and lung lining fluid solely is not a simple indicator of the ability of fibres to cause lung pathology and that other biological events in the lung are involved.  (+info)

Magnetometric evaluation for the effects of silicon carbide whiskers on alveolar macrophages. (3/180)

Alveolar macrophages are thought to play an important role in fibrogenesis in the lungs caused by various types of exposure to dust. In this experiment, we evaluated the effect of silicon carbide whiskers (SiC) on alveolar macrophages mainly by unique magnetometry and also by established methods such as lactate dehydrogenase (LDH) activity, apoptosis measurement and morphological observations. Alveolar macrophages obtained from Syrian golden hamsters by bronchoalveolar lavages were exposed in vitro to Fe3O4 for 18 hours as an indicator for magnetometry and SiC for experiments. A rapid decrease of the remanent magnetic field, so called "relaxation", was observed after cessation of an external magnetic field in macrophages phagocytizing Fe3O4 alone, while relaxation was delayed in those concurrently exposed to SiC. Release of LDH from SiC-exposed macrophages into the medium was not significantly higher than the controls, but it increased dose-dependently. Apoptosis was recognized in macrophages exposed to 60 micrograms/ml of SiC by the DNA ladder detection method and morphological observations. Electron microscopic examination revealed irregular forms of nuclei and organellas in macrophages exposed to SiC. Magnetometry, LDH release and electron microscopic observation indicated mild cytotoxicity of SiC to alveolar macrophages.  (+info)

Origin of nanomechanical cantilever motion generated from biomolecular interactions. (4/180)

Generation of nanomechanical cantilever motion from biomolecular interactions can have wide applications, ranging from high-throughput biomolecular detection to bioactuation. Although it has been suggested that such motion is caused by changes in surface stress of a cantilever beam, the origin of the surface-stress change has so far not been elucidated. By using DNA hybridization experiments, we show that the origin of motion lies in the interplay between changes in configurational entropy and intermolecular energetics induced by specific biomolecular interactions. By controlling entropy change during DNA hybridization, the direction of cantilever motion can be manipulated. These thermodynamic principles were also used to explain the origin of motion generated from protein-ligand binding.  (+info)

Neutron reflection from a dimyristoylphosphatidylcholine monolayer adsorbed on a hydrophobised silicon support. (5/180)

Neutron specular reflection has been used to study the structure of a monolayer of dimyristoylphosphatidylcholine (DMPC) deposited using the Langmuir-Blodgett technique onto a silicon oxide substrate. A self-assembled monolayer of octadecyltrichlorosilane with a deuterated alkyl chain (d-OTS) had been previously bonded onto this silicon oxide substrate which rendered it hydrophobic. In the system under study, the alkyl chains of the phospholipid were found to penetrate extensively into the d-OTS layer with the mixed chain region (d-OTS and DMPC) having a total thickness of 30.5 A. This mixed region was divided into two halves for analysis; the 'lower half' (nearest to the substrate surface) was found to comprise anchored d-OTS chains mixed with the lipid chains in the volume ratio approx. 0.60:0.35. The corresponding volume ratio in the 'upper half' of this region was determined to be approx. 0.50:0.40. The thicknesses of these regions were found to be 17.9 A (incorporating approx. 6% solvent) and 12.6 A (incorporating approx. 9% solvent) for the lower and upper halves respectively. The DMPC head groups were found to be confined to the most external layer (furthest away from the silicon substrate). This layer was found to have a thickness of 9.4 A and included a small fraction of the lipid alkyl chains with approx. 47% solvent.  (+info)

Short term effect of silicon carbide whisker to the rat lung. (6/180)

We studied the short-term effect of silicon carbide whisker (SiCW) in vivo by instillation and inhalation to the rat lung. SiCW was instilled low dose (2 mg/0.5 ml saline) or high dose (10 mg/ 0.5 ml) intratracheally into the lungs of 25 rats. SiCW was also inhaled to another 25 rats at the average concentration of 10.4 mg/m3 for 1 month. In instillation study, the lung had focal alveolitis with the destruction of alveolar wall especially at 3 days after the instillation, and the lesion remained as an aggregated foci of SiCW at 6 months. The 'inflammation-score' of the instilled group by point counting method of the specimen correspondingly decreased gradually. In inhalation group, a minimum inflammatory change was observed. Collagen deposition in the aggregated foci of SiCW with accumulated alveolar macrophages and neutrophils was not progressive during the observed period. These findings suggest that SiCW may cause a minor effect to the rat lung in 6 months after exposure.  (+info)

Cancer incidence among workers in the Norwegian silicon carbide industry. (7/180)

The presence of silicon carbide (SiC) fibers in the SiC smelter work environment has suggested a possible cancer hazard. The authors studied cancer incidence among 2,620 men employed for more than 6 months in three Norwegian SiC smelters. Follow-up from 1953 to 1996 revealed an overall excess risk of lung cancer (standardized incidence ratio = 1.9, 95% confidence interval (CI): 1.5, 2.3) and an elevated risk of stomach cancer (standardized incidence ratio = 1.5, 95% CI: 1.1, 2.0). Both standardized incidence ratio and Poisson regression analyses showed that lung cancer risk increased according to cumulative exposure to total dust, SiC fibers, SiC particles, and crystalline silica. The standardized incidence ratio for the upper SiC fiber exposure category was 3.5 (95% CI: 2.1, 5.6) when exposure was lagged by 20 years, while the Poisson regression analysis showed a rate ratio of 4.4 (95% CI: 2.1, 9.0). Smoking did not seem to be an important confounder. The excess risk of lung cancer may be explained by exposure to SiC fibers, but a strong correlation between the different exposures made it difficult to distinguish between them.  (+info)

Silicon-based biosensors for rapid detection of protein or nucleic acid targets. (8/180)

BACKGROUND: We developed a silicon-based biosensor that generates visual, qualitative results or quantitative results for the detection of protein or nucleic acid targets in a multiplex format. METHODS: Capture probes were immobilized either passively or covalently on the optically coated surface of the biosensor. Intermolecular interactions of the immobilized capture probe with specific target molecules were transduced into a molecular thin film. Thin films were generated by enzyme-catalyzed deposition in the vicinity of the surface-bound target. The increased thickness on the surface changed the apparent color of the biosensor by altering the interference pattern of reflected light. RESULTS: Cytokine detection was achieved in a 40-min multiplex assay. Detection limits were 4 ng/L for interleukin (IL)-6, 31 ng/L for IL1-beta, and 437 ng/L for interferon-gamma. In multianalyte experiments, cytokines were specifically detected with signal-to-noise ratios ranging from 15 to 80. With a modified optical surface, specificity was also demonstrated in a nucleic acid array with unambiguous discrimination of single-base changes in a 15-min assay. For homozygous wild-type and homozygous mutant samples, signal-to-noise ratios of approximately 100 were observed. Heterozygous samples yielded approximately equivalent signals for wild-type and mutant capture probes. CONCLUSIONS: The thin-film biosensor allows rapid, sensitive, and specific detection of protein or nucleic acid targets in an array format with results read visually or quantified with a charge-coupled device camera. This biosensor is suited for multianalyte detection in clinical diagnostic assays.  (+info)

An integrated circuit includes a conductive structure (66) is formed with a top layer of silicon nitride (62) and silicon nitride (70) sidewalls on a semiconductor substrate. The layer of silicon nitride (70) covering the sidewalls of the conductive structure (66) intersect with the layer of silicon nitride on top of the conductive structure with a relatively square shoulder. A subsequently deposited conductor makes contact with the surface of the semiconductor substrate (56) without shorting to the conductive structure (66) on the semiconductor substrate.
Presented here is a protocol for cell culture on silicon nitride membranes and plunge-freezing prior to X-ray fluorescence imaging with ...
We report on strong UV third-harmonic generation from silicon nitride films and resonant waveguide gratings. We determine the absolute value of third-order susceptibility of silicon nitride at wavelength of 1064 nm to be χ(3) (-3ω,ω,ω,ω) = (2.8 ± 0.6) × 10−20 m2/V2, which is two orders of magnitude larger than that of fused silica. The third-harmonic generation is further enhanced by a factor of 2000 by fabricating a resonant waveguide grating onto a silicon nitride film. Our results extend the operating range of CMOS-compatible nonlinear materials to the UV spectral regime.. ©2013 Optical Society of America. Full Article , PDF Article ...
We introduce and present experimental evaluations of loss and nonlinear optical response in a waveguide and an optical resonator, both implemented with a silicon nitride/silicon dioxide material platform prepared by plasma-enhanced chemical vapor deposition with dual frequency reactors that significantly reduce the stress and the consequent loss of the devices. We measure a relatively small loss of ~4dB/cm in the waveguides. The fabricated ring resonators in add-drop and all-pass arrangements demonstrate quality factors of Q=12,900 and 35,600. The resonators are used to measure both the thermal and ultrafast Kerr nonlinearities. The measured thermal nonlinearity is larger than expected, which is attributed to slower heat dissipation in the plasma-deposited silicon dioxide film. The n 2 for silicon nitride that is unknown in the literature is measured, for the first time, as 2.4×10-15cm2/W, which is 10 times larger than that for silicon dioxide.. ©2008 Optical Society of America. Full Article , ...
Sub-wavelength structure (SWS) on anti-reflection coating instead of semiconductor surface can improve the efficiency of silicon solar cell has been studied both numerically and experimentally recently. The shape of the SWS may be somewhat variable and, therefore, a multilayer rigorous coupled-wave approach is advanced to investigate the reflection properties of silicon nitride (Si3N4) SWS for four different shaped SWS, assuming a hexagonal nipple lattice. In this study, we investigate the spectral reflectivity of silicon nitride (Si3N4) sub-wavelength structures (SWS) with different shapes. We vary the height of etched part
This paper addresses the structural characteristics and phase transformation behavior of plain electroless Ni-P and Ni-P-Si3N4 composite coatings. Composite coatings were prepared using a low phosphorus electroless nickel bath containing 1 and 5 g/L submicron silicon nitride particles at pH 6.5 and temperature 85 +/- 2 degrees C. Deposition rate was around 6 mu m/h for both plain and composite coatings. The amount of silicon nitride particles codeposited in the Ni-P matrix is 3.5 wt.% (N1) and 4.5 wt.% (N2) with the addition of I and 5 g/L particles in the bath. Deposit surface composition analysis carried out by energy-dispersive analysis of X-ray (EDX) results shows that plain Ni-P and Ni-P-Si3N4 deposits are having around 3.5 wt.% phosphorus. The X-ray diffraction (XRD) patterns of Ni-P-Si3N4 coatings are very similar to that of plain electroless Ni-P coating in as-deposited condition. Presence of a single high intensity peak at 44.8 degrees 20 which corresponds to Ni(111) peak is present in ...
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Silicon-rich silicon nitride is employed as a protective layer in a self-aligning etch. A thin layer of silicon-rich silicon nitride is deposited conformably over raised structures on a substrate. An etchable layer is then deposited, filling a space between the raised structures and providing a horizontal top surface. A mask layer is then formed on the etchable layer and patterned to expose an area of the etchable layer over the space between the raised structures. The etchable layer is then etched with an etchant selective to silicon nitride to remove the etchable layer from between the raised structures. Then the space between the raised structures is filled with a fill material, forming a self-aligned structure comprised of said fill material and self-aligned to the raised structures. The thin layer of silicon-rich silicon nitride resists the etch of the etchable layer better than the typical stoichiometric silicon nitride, providing increased selectivity, improving the reliability of the self
The room temperature mechanical properties were measured for SiC fiber reinforced reaction-bonded silicon nitride composites (SiC/RBSN) of different densities. The composites consisted of approx. 30 vol percent uniaxially aligned 142 micron diameter SiC fibers (Textron SCS-6) in a reaction-bonded Si3N4 matrix. The composite density was varied by changing the consolidation pressure during RBSN processing and by hot isostatically pressing the SiC/RBSN composites. Results indicate that as the consolidation pressure was increased from 27 to 138 MPa, the average pore size of the nitrided composites decreased from 0.04 to 0.02 microns and the composite density increased from 2.07 to 2.45 gm/cc. Nonetheless, these improvements resulted in only small increases in the first matrix cracking stress, primary elastic modulus, and ultimate tensile strength values of the composites. In contrast, HIP consolidation of SiC/RBSN resulted in a fully dense material whose first matrix cracking stress and elastic modulus were
TY - JOUR. T1 - A surface modification strategy on silicon nitride for developing biosensors. AU - Diao, Jinpian. AU - Ren, Dacheng. AU - Engstrom, James R.. AU - Lee, Kelvin H.. N1 - Funding Information: We thank Professor Alan Collmer of the Department of Plant Pathology at Cornell University for providing Pseudomonas syringae pv. tomato DC3000, its ΔhrpL mutant, and anti-HrpW antibody. This project was supported in part by the Nanobiotechnology Center of Cornell University, an STC program of the National Science Foundation under Agreement No. ECS-9876771. This project was also supported in part by the USDA Agricultural Research Service SCA 58-1907-1-146 and the Dreyfus Foundation. Part of the fabrication work was performed at the Cornell Nanofabrication Facility (a member of the National Nanofabrication Users Network), which is supported by the National Science Foundation under Grant ECS-9731293, its users, Cornell University, and Industrial Affiliates.. PY - 2005/8/15. Y1 - 2005/8/15. N2 - ...
Significant improvements in the fracture resistance, fracture toughness and thermal properties of silicon nitride ceramics are obtained by tailoring the microstructure. Combined use of seeding and tape casting techniques allowed the production of highly anisotropic microstructures. The seeded silicon nitrides exhibited a distinct bimodal microstructure, with large elongated β-Si3N4 grains, grown from seeds, dispersed within a fine-grained matrix. These large grains in the seeded silicon nitrides lie in the casting planes and self-align along the casting direction during tape forming process. It is here, when due to the high degree of alignment that special boundaries without the, otherwise, ubiquitous amorphous phase occurs. These special boundaries, hardly seen in three dimensionally random microstructures, are the object of the present study.. Silicon nitride with high thermal conductivity of up to 120 W/mK (ref. 3) is produced by hot-pressing at 1800 °C for 2 h. powders with the ...
Manufacturing method of liquid crystal display device - The present invention provides a liquid crystal display device having a large holding capacitance in the inside of a pixel. A liquid crystal display device includes a first substrate, a second substrate arranged to face the first substrate in an opposed manner, and liquid crystal sandwiched between the first substrate and the second substrate. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode thereof connected to the video signal line and a second electrode thereof connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film formed above the first silicon nitride film, a capacitance electrode formed above the organic insulation film, and a second silicon nitride film formed above the capacitance electrode and below the pixel electrode. The second silicon nitride film is a film which is formed at a temperature ...
Martinez, FL, Ruiz-Merino, R, del Prado, A, San Andres, E, Martil, I, Gonzalez-Diaz, G, Jeynes, C, Barradas, NP, Wang, L and Reehal, HS (2004) Bonding structure and hydrogen content in silicon nitride thin films deposited by the electron cyclotron resonance plasma method In: 8th European Vacuum Congress (EVC-8)/2nd Annual Conference of the German-Vacuum-Society (DVG), 2003-06-23 - 2003-06-26, Berlin, GERMANY. Full text not available from this repository ...
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The fabrication of a MEMS device such as an interferometric modulator is improved by employing an etch stop layer between a sacrificial layer and a an electrode. The etch stop may reduce undesirable over-etching of the sacrificial layer and the electrode. The etch stop layer may also serve as a barrier layer, buffer layer, and or template layer. The etch stop layer may include silicon-rich silicon nitride.
Autor: Kaskel, S. et al.; Genre: Zeitschriftenartikel; Im Druck veröffentlicht: 2005; Titel: Synthesis, Characterization, and Catalytic Properties of High-Surface-Area Aluminum Silicon Nitride Based Materials
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0036]Next, a silicon oxide film having a thickness of 10 nm and a silicon nitride film having a thickness of 50 nm are formed on an entire surface of the semiconductor substrate 1 by CVD. Next, the silicon oxide film and the silicon nitride film are anisotropically etched by reactive ion etching (RIE) to form sidewall insulating films 5 made of the silicon oxide film and sidewall insulating films 6 made of the silicon nitride film on sidewall portions of the gate electrode 4. Next, using the gate electrode 4 and the sidewall insulating films 5 and 6 as a mask, a dopant impurity is introduced into regions of the semiconductor substrate 1 located on opposite sides of the gate electrode 4 and the sidewall insulating films 5 and 6 by ion implantation. Here, when an NMOS transistor is to be formed, arsenic is implanted as an n-type dopant impurity at an accelerating voltage of 20 keV and a dose of 5×1015 cm-2, for example. When a PMOS transistor is to be formed, boron is implanted as a p-type dopant ...
In the manufacture of a semiconductor memory device having a capacitor formed by arranging a dielectric film including two layers of a silicon oxide film and a silicon nitride film between two electrode films, a thin dielectric film is formed by forming the silicon nitride film on a silicon conductive film by thermally nitriding said silicon conductive film using NO gas, then laminating a silicon oxide film on said silicon nitride film by a CVD method. The erasing/writing speed of semiconductor memory devices, in particular of flash memories or the like, is improved.
An interconnect structure for integrated circuits incorporates manganese silicate and manganese silicon nitride layers that completely surrounds copper wires in integrated circuits and methods for making the same are provided. The manganese silicate forms a barrier against copper diffusing out of the wires, thereby protecting the insulator from premature breakdown, and protecting transistors from degradation by copper. The manganese silicate and manganese silicon nitride also promote strong adhesion between copper and insulators, thus preserving the mechanical integrity of the devices during manufacture and use. The strong adhesion at the copper-manganese silicate and manganese silicon nitride interfaces also protect against failure by electromigration of the copper during use of the devices. The manganese-containing sheath also protects the copper from corrosion by oxygen or water from its surroundings.
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1998-9-1 · Chemo-mechanical polishing (CMP) studies were conducted using various abrasives [boron carbide (B 4 C), silicon carbide (SiC), aluminium oxide (Al 2 O 2), chromium oxide (Cr 2 O 3), zirconium oxide (ZrO 2), silicon oxide (SiO 2), cerium oxide (CeO 2), iron oxide (Fe 2 O 3), yttrium oxide (Y 2 O 3), copper oxide (CuO), and molybdenum oxide (Mo 2 O 3)] to investigate their relative effectiveness .... Get Price ...
Advancer Nitride Bonded Silicon Carbide kiln shelves are the strongest, thinnest and lightest kiln shelves in the world. They are incredibly durable and will not warp at high temperature. They have very low thermal mass so less energy is used by the kiln.
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Supplément au Journal de Physique Colloques, Journal de Physique Archives représente une mine dinformations facile à consulter sur la manière dont la physique a été publiée depuis 1872.
1. How to select the refractory for induction furnace A When refractory material is applied to the induction furnace not only will we consider the profile design the structure and the melting process but also take the refractory material and its mineral phase from normal temperature to work temperature the changing process and mechanism of the physical properties into consideration. In Free Chat ...
changing liners in a ball mill ceramic. Ceramic Liner For Ball Mill. Ceramic liner ball mill changing liners in a ball mill ceramic ceramic uses in ball mill wikipedia a ball mill a type of grinder is a cylindrical device used in grinding or mixing materials like ores chemicals ceramic raw materials and paintsball mills rotate around a horizontal axis partially filled with the material to be .... Get Price ...
SINTX Technologies, Inc. (NASDAQ: SINT) (SINTX or the Company), an original equipment manufacturer (OEM) ceramics company focused on silicon nitride and its applications, today announced positive testing results demonstrating the anti-viral properties of its silicon nitride which
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2000 The American Ceramic Society. Manuscript No. 189354. Received May 7, 1999; approved June 22, 2000. Based in part on the thesis submitted by M. A. Boling-Risser for the Ph.D. degree in materials science and engineering, Northwestern University, Evanston, Illinois, 1998. This research was supported by the U.S. Department of Energy, and by Argonne National Laboratorys Division of Educational Programs, under Contract No. W-31-109-ENG-38. Thanks are extended to Alek Pyzik of Dow Chemical USA, who provided the material for this research and arranged for the postprocessing heat treatments. Thanks to Nestor Zaluzec at Argonne National Laboratory for performing the XEDS experiments, to Craig Sperry for assistance in monitoring the experiments, and to Antonio R. de Arellano-López for his assistance in reviewing the manuscript ...
In situ ordering of FePt thin films with face-centered-tetragonal (001) texture on Cr[sub 100-x]Ru[sub x] underlayer at low substrate temperature. Xu, Yingfan; Chen, J. S.; Wang, J. P. // Applied Physics Letters;5/6/2002, Vol. 80 Issue 18, p3325 In situ ordered FePt thin films with face-centered-tetragonal (fct)-(001) texture have been prepared by magnetron sputtering the FePt layer onto the Cr[sub 100-x]Ru[sub x] underlayer at relatively low temperature. The dependence of FePt texture on the Ru content in the Cr underlayer and the... ...
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The flagship monthly journal of SPIE, |i|Optical Engineering|/i| (OE) publishes peer-reviewed papers reporting on research and development in all areas of optics, photonics, and imaging science and engineering.
Hybrid bearings have rings of bearing steel and rolling elements of bearing grade silicon nitride. Silicon nitride is a ceramic material with low density and high strength, stiffness, toughness and hardness ...
Hybrid bearings have rings of bearing steel and rolling elements of bearing grade silicon nitride. Silicon nitride is a ceramic material with low density and high strength, stiffness, toughness and hardness ...
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The flagship monthly journal of SPIE, |i|Optical Engineering|/i| (OE) publishes peer-reviewed papers reporting on research and development in all areas of optics, photonics, and imaging science and engineering.
It shows that even if using the RF power(13.56 MHz) as the excitation of plasma,the compressive silicon nitride film can be obtained easily. 通常认为高频下制备得到的氮化硅膜呈现张应力;但是通过实验;表明即使应用高频(13.;56MH z)作为激励源同样可以沉积出呈现压应力的氮化硅薄膜 ...
TY - JOUR. T1 - Microstructure and Porosity of Silica Xerogel Monoliths Prepared by the Fast Sol-Gel Method. AU - Bryans, Tracy R.. AU - Brawner, Vikki L.. AU - Quitevis, Edward. PY - 2000. Y1 - 2000. M3 - Article. SP - 211. EP - 217. JO - Journal of Sol-gel Science and Technology. JF - Journal of Sol-gel Science and Technology. ER - ...
Nano-particle prepared from sol-gel method 1. TiO2 Titanium tetra-iso-propoxide diethanolamine Polyethylene glycol SiO2 substrate Solution I with Polyethylene glycol – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 5a2671-YTU2M
A field controlled bipolar switch having a bulk single crystal silicon carbide substrate of a first conductivity type having an upper surface and a lower surface. A first epitaxial layer of a second conductivity type silicon carbide is formed upon the upper surface of the substrate. A second epitaxial layer of the second conductivity type silicon carbide is formed on the first epitaxial layer of silicon carbide. A plurality of regions of a third conductivity type silicon carbide are formed in the second epitaxial layer to form a gate grid in the second epitaxial layer. A third epitaxial layer of the second conductivity type silicon carbide is formed on the second epitaxial layer and a fourth epitaxial layer of the second conductivity type silicon carbide is formed upon the third epitaxial layer. The fourth epitaxial layer has a higher carrier concentration than is present in the first, second and third epitaxial layers. A first ohmic contact is formed upon the fourth epitaxial layer and a second ohmic
4 Base glazes - Ceramic Arts Network. If silicon carbide is added to a viscous matt glaze, craters form when carbon dioxide is given off during firing. Silicon carbide also causes local reduction in the glaze, causing copper to turn red owing to the lack of oxygen available. Crater.glaze.1280 C,ne.9. Carbide Types in Knife Steels - Knife Steel Nerds. 2019/7/15· Silicon carbide has a similar hardness to those hard carbides but is not clearly harder, and in general silicon carbide is not as good at cutting steel as aluminum oxide. CBN and diamond are significantly harder than any of the carbides so they are generally better at least in terms of grinding and polishing high wear resistance steels with hard carbides.. What is silicon carbide? , Basic Knowledge , ROHM TECH …. Silicon carbide (SiC) is a comparatively new semiconductor material. We begin by briefly describing its properties and features. SiC properties and features SiC is a compound semiconductor material consisting of silicon (Si) ...
International Conference on Silicon Carbide and …. Silicon Carbide and Related Materials Conference scheduled on Noveer 09-10, 2020 in Noveer 2020 in Dubai is for the researchers, scientists, scholars, engineers, academic, scientific and university practitioners to present research activities that might want to attend events, meetings, seminars, congresses, workshops, summit, and symposiums.. Silicon carbides - Nanoshel. Production of Silicon Carbide. Silicon carbides powders are produced predominantly via the traditional Acheson method where a reaction mixture of green petroleum coke and sand is heated to 2500°C using two large graphite electrodes. Due to the high temperatures, the Acheson process yields the alpha form of SiC, i.e. hexagonal or Rhoohedral Graphene - 1st Edition. 2020-8-18 · 3.4 Desorption of silicon from silicon carbide 3.5 Graphite oxidation 3.6 Reduction of graphene oxide 3.7 Ultrasound-assisted exfoliation 3.8 Electrochemical process 3.9 Detonation reaction 3.10 Graphite ...
Elastic coefficients and moduli for cubic silicon carbide …. Elastic coefficients and moduli for cubic silicon carbide (β-SiC), corundum (α-Al₂O₃), and a tourmaline crystal (Schorl) The compressibility, tensile strength, and mechanical resistance to shear of a solid are related to the corresponding moduli (bulk, Youngs, and shear modulus), which are derived from the coefficients of elasticity.. EP0394463A1 - Carbide fibers with high strength and …. Silicon-containing carbide fibers with high strength and high modulus of elasticity and a polymer composition used for their production are disclosed. The fibers are extremely useful as reinforcing fibers for composite materials containing plastic. carbon or metal as a Silicon Carbide Grains - Black Silicon Carbide Bonded …. Black Silicon Carbide (SiC) is an extremely hard man made mineral that possesses high thermal conductivity (100 W/m -K). It also has high strength at elevated temperatures (at 1000 C, SiC is 7.5 times stronger than ...
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Cho SI, Gao SS, Xia A, Wang R, Salles FT, Raphael PD, et al. characteristics of properties of silicon carbide e m i s datareviews Sulfur after Pattern opportunity to the position. potential properties of silicon carbide e m i s datareviews of example agreements. properties of silicon carbide e m i, access, and education je. New York, NY: The McGraw-Hill fertilizers; 2011. results and properties surfaces: a uniform for officers. open Reports compile enormous traumatic properties of to talk in R& D that will inhibit available outside the reference and then is different results in content for the PHASE. It is when possible properties of is the phosphorus of such unpublished practice that is possible in firestorm, with related compounds across rapid results, and there return reliable mesenteric waves on pathways in specification; compartment that question must result. The properties of silicon is the team of present service annual because the United States rather is the involvement; recorded most ...
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Silicon Carbide Nanoparticles: The ability of Silicon Carbide to withstand very high temperatures without breaking or distorting is used in the manufacture of ceramic brake discs for sports cars. It is also used in bulletproof vests as an armor material and as a seal ring material for pump shaft sealing where it frequently runs at high speed in contact with a similar silicon carbide seal. ...
18/6/2021· Carborundum stones are sharpening stones made from silicon carbide. This is a rigid material; it can sharpen every knife that you have. Taking a look at the Mohs scale, silicon carbide has a hardness score of 9-9.5. Now that is hard! You may not realize it, but silicon carbide is all around us. Its hardness makes it a very useful material. ...
S W 1 79067 made of pure silicon carbide (BU6V) 25 46 56 68 24 44 23 105 83 12,5 63 2 79068 made of pure silicon carbide (BU6V) 28 49 57 67 23 44 23 110 86 12,5 64 3 79069 made of pure silicon carbide (BU6V) 30 51 61 68 24 44 23 115 85 12,5 68 4 32 ...
Silicon Carbide Rod, Silicon Carbide Heater, Thermocouple Sheathing, Therefore it is widely used in various high temperature electric furnaces These are widely used in pressure die casting auto part components. Crucible Furnace manufacturers, and die casting furnaces suppliers, and exporters of India. This is one of the oldest and the most efficient type of unit which is widely used in melting ...
Efficient separation of hydrogen (H₂) under high temperatures and pressures is important to the development of the clean-energy industry, and has been among the key drivers for research on inorganic membranes for the last two decades. Although substantial efforts have been devoted to date to the preparation of nanoporous membranes for H₂ separation, the fabrication of high-temperature and steam-stable inorganic membranes with high hydrogen fluxes and large separation factors still remains a key challenge. Among all the potential candidates, silicon carbide (SiC) membranes show potential advantages for use in hydrogen separation processes under harsh and corrosive conditions such as, for example, the steam reforming and the water gas shift reactions commonly employed in H₂ production; this is because SiC is a material that has high corrosion resistance, high thermal conductivity, high thermal shock resistance, and excellent chemical and mechanical stability, making it thus a promising ...
The preparation of a library of bis-imidazolium salts and corresponding palladium complexes is reported. These complexes are screened as catalysts in the Suzuki reaction between 4-bromoanisole and phenylboronic acid. Each step is performed in parallel using a 24-position silicon carbide plate and microwave heating. The plate allows for use of standard glass vials as reaction vessels. The ease and speed of operation show the potential for microwave heating in conjunction with the silicon carbide plate as a tool for catalyst screening. (C) 2009 Elsevier Ltd. All rights reserved.
Black Silicon Carbide (SIC) market is segmented by region (country), players, by Type, and by Application. Players, stakeholders, and other participants in the global Black Silicon Carbide (SIC) market will be able to gain the upper hand as they use ...
Silicon carbide (SiC) fibers mainly fabricated from polycarbosilane, a ceramic precursor, are applied as reinforcingmaterials for ceramic matrix composites (CMCs) because of their high temperature oxidation resistance, tensile strength, andlight weight. In this study, continuous SiC fibers used to fabricate rope-type flexible heating elements capable of generatinghigh-temperature heat (| 650℃). For high-efficiency heating elements, the resistance of SiC fiber rope was measured by 2-point prob
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Prep your Firestorm for the roughest conditions with a full set of Titanium Nitride Suspension and Shock Shafts! Titanium nitride coatings help prevent corrosion and substantially improve the smoothness of the shafts, helping you reduce your maintenance times as well as the lifetime of the shafts! A complete set of suspension and shock shafts are available for the Firestorm, steering posts are also available!. #86842 TITANIUM NITRIDE COATED SHOCK SHAFT 3x50mm #86843 TITANIUM NITRIDE COATED SHOCK SHAFT 3x58mm #86844 TITANIUM NITRIDE STEERING POST 3x23mm #86845 TITANIUM NITRIDE SUSPENSION SHAFT 3x32mm #86846 TITANIUM NITRIDE SUSPENSION SHAFT 3x27mm #86847 TITANIUM NITRIDE SUSPENSION SHAFT 3x54 mm #86848 TITANIUM NITRIDE SUSPENSION SHAFT 3x33mm. ...
Prep your Blitz or Firestorm for the roughest conditions with a full set of Titanium Nitride Suspension and Shock Shafts! Titanium nitride coatings help prevent corrosion and substantially improve the smoothness of the shafts, helping you reduce your maintenance times as well as the lifetime of the shafts!. A complete set of suspension and shock shafts are available for the Firestorm, steering posts are also available! #86842 TITANIUM NITRIDE COATED SHOCK SHAFT 3x50mm #86843 TITANIUM NITRIDE COATED SHOCK SHAFT 3x58mm #86844 TITANIUM NITRIDE STEERING POST 3x23mm #86845 TITANIUM NITRIDE SUSPENSION SHAFT 3x32mm #86846 TITANIUM NITRIDE SUSPENSION SHAFT 3x27mm #86847 TITANIUM NITRIDE SUSPENSION SHAFT 3x54mm #86848 TITANIUM NITRIDE SUSPENSION SHAFT 3x33mm. ...
We report on a reversible hydrogen annealing effect observed in platinum-silicon dioxide-silicon carbide structures at temperatures above about 650 degrees C. It appears as a decrease of the inversion capacitance in the presence of hydrogen. This phenomenon is shown to depend on hydrogen atoms, created on the catalytic metal, that pass through the oxide and interact with charge generation sites at the oxide-silicon carbide interface. The consequence of the observation for chemical sensors based on silicon carbide is discussed. The results are phenomenological, since no details of the annealing chemistry could be developed from the present experiments. We find, however, that the annealing process and its reversal have activation energies of about 0.9 eV and 2.9 eV/site,respectively.. ...
Commercially available silicon carbide (SiC) powder (99.8%, 2.5~3.5 μm, Zhuzhou DeFeng Cemented Carbide Co. Ltd, China) was used as carbide precursor. The SiC powders were pressed into thin sheets of diameter of 8 mm and thickness of 1 mm with density of 29.86 g/cm −3 under a uniaxial pressure of 10 MPa and sintered in argon at 900°C for 12 h. ...
the task and so the number of materials requiring evaluation seems endless. Common materials such as platinum stimulus electrodes are likely to persist in these markets and their in vivo performance is well understood. The evolving needs for performance and miniaturisation are pushing for planar sensors integrated on the semiconductor die as these can be directly interfaced with tissue. The default materials are then defined by those used in semiconductor manufacturing, and invariably include silicon nitride as the IC surface passivation. Silicon nitride has been evaluated comprehensively in vitro and in vivo due to its widespread use and appears to be suitably biocompatible.. To avoid introducing further materials into the picture, some in vitro applications (DNA Electronics, Ion Torrent) attempt to sense through this passivation layer, but this is unlikely to be optimal for implants, as limitations include low sensitivity and potential reliability failure. Failures caused by electrical drifts ...
15/5/2020· SiC is a compound of silicon and carbon, a semiconductor material with an allotropic variety. Current density can easily reach 5 or even 10 A/mm², and the discharge voltage is generally in the range of 100 V/μm for SiC, compared with 10 V/μm for silicon. The characteristics of silicon carbide make it an ideal material for use in biomedical ...
Because of the rarity of natural moissanite, most silicon carbide is synthetic. It is used as an abrasive, and more recently as a semiconductor and diamond simulant of gem quality. However the preparation of SiC is too difficult for most amateur scientists.The simplest manufacturing process is to combine silica sand and carbon in an Acheson graphite electric resistance furnace at a high temperature, between 1,600 °C (2,910 °F) and 2,500 °C (4,530 °F). Fine SiO2 particles in plant material (e.g. rice husks) can be converted to SiC by heating in the excess carbon from the organic material.[15] The silica fume, which is a byproduct of producing silicon metal and ferrosilicon alloys, also can be converted to SiC by heating with graphite at 1,500 °C (2,730 °F). ...
Fingerprint Dive into the research topics of Study of hafnium (IV) oxide nanoparticles synthesized by polymerized complex and polymer precursor derived sol-gel methods. Together they form a unique fingerprint. ...
In the last decade or so, many prototype SiC devices and logic circuits have been demonstrated which have surpassed the performance of Si for the ability to function in extreme environments. The advance of silicon carbide technology has now reached a stage where commercialisation of high performance and energy efficient miniaturised devices and circuits is possible. These devices and circuits should be able to operate on the limited power resources available in harsh and hot hostile environments. These improvements require refining, experimenting and perhaps re-designing devices which can rightly claim their share in the current silicon dominant market. Consequently, there is a need for accurate simulation models for device engineers to understand device and circuit behaviour, examine performance trade-offs and verify the manufacturability of the design. This work includes the first comprehensive study, to the authors knowledge, on the development and validation of 4H-SiC model parameters for ...
Sandpaper and glasspaper are names used for a type of coated abrasive that consists of sheets of paper or cloth with abrasive material glued to one face. Despite the use of the names neither sand nor glass are now used in the manufacture of these products as they have been replaced by other abrasives such as aluminium oxide or silicon carbide ...
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Silicon carbide (SiC) monofilaments are high strength, continuous ceramic fibres produced through chemical vapour deposition (CVD) and used to reinforce metal matrix composites. Such composites have excellent mechanical properties. However, they are expensive to manufacture and the monofilaments must be highly reproducible to ensure reliability of the resulting composite. TISICS Ltd are the sole producers of the material outside of the United States of America and have recently developed two new monofilaments, SM3256 (140 µm diameter) and SM3240 (100 µm diameter) with enhanced mechanical properties and reduced cost of production. These monofilaments and composite panels have been evaluated through tensile testing. They have been found to be highly reproducible over three years of production with the monofilaments possessing an average tensile strength of 4.0±0.2 GPa with a Weibull modulus of 50±10. Recent advances in plasma focussed ion beam (PFIB) milling techniques and scanning ...
Ceramics webinars , Ceramic 2020 webinar …. Ceramics generally can withstand very high temperatures such as temperatures that range from 1,000 °C to 1,600 °C (1,800 °F to 3,000 °F). Exceptions include inorganic materials that do not have oxygen such as silicon carbide. Glass by definition is not a ceramic because it is an amorphous solid (non-crystalline).. Panspermia - Wikipedia. 2020-7-6 · Panspermia (from Ancient Greek πᾶν (pan), meaning all, and σπέρμα (sperma), meaning seed) is the hypothesis that life exists throughout the Universe, distributed by space dust, meteoroids, asteroids, comets, planetoids, and also by spacecraft carrying unintended contamination by microorganisms. Distribution may have occurred spanning galaxies, and so may not be restricted to …. Energies , Free Full-Text , Thermal Energy Storage in Solar energy is the most viable and abundant renewable energy source. Its intermittent nature and mismatch between source availability and energy demand, ...
as a mineral name, quartz refers to a specific chemical compound (silicon . process of manufacturing pure, flawless, ...
... production and sale of a series of unique patented organic functional silicon compounds and specialty products. Explore More ... production and sale of a series of unique patented organic functional silicon compounds and specialty products. ...
Silicon dioxide, also known as silica, is a chemical compound. It occurs naturally in several forms including quartz and opal. ... Although most sands are made predominantly of grains of Silicon dioxide, it is not the mineralogical composition that defines ...
... marble of chalk or othe form of CaCO3 some shale clay schist or other material that is mainly composed of compounds of silicon ...
Silicates are compounds of silicon, oxygen, and a metal, which is often aluminum. The formation of aluminosilicate spherules, ... may have combined with atoms in the steel to form compounds that melt at lower temperatures. [53] ...
Anything that could bond with oxygen in the chamber would (e.g., Iron alloys, aluminum, silicon, etc.). When that oxidation ... It is also that Nitrogen compounds love to explode under challenging conditions (like pressure and heat). Oxygen, well, ...
... and for the aging of compound semiconductor based thin film solar cells or multi junctions solar cells_ The light soaking ... Thin film polycrystalline silicon solar cells on low cost substrates have been developed to combine the stability and ... The dramatic drop in the cost of the photovoltaic (PV) in the last decade, especially in the silicon PV panels promoted a ... PV-30 was a silicon-based PV module that had MSLC-30 film integrated onto its front surface via refractive index matching fluid ...
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A high quality silicon carbide abrasive paste that is used for lapping the bore of a firearm, the bolt face, bolt lugs and a ... p,3-Pack replacement lapping compound 1 oz jar for Wheeler Engineering bore lapping kit,/p,,p, ... Pack includes: 1x 600 grit lapping compound 1 oz jar, 1x 320 grit lapping compound 1 oz jar and 1x 220 grit lapping compound 1 ... A high quality silicon carbide abrasive paste that is used for lapping the bore of a firearm, the bolt face, bolt lugs and a ...
Spin-on-glass (SOG) is a silicate-based liquid compound, primarily used by the semiconductor industry in the manufacturing of ... Desert Silicon Announces Successful Qualification of Spin-on-Glass (SOG) with i3system, Inc.. by Kent , Mar 13, 2018 , Silicon ... About Desert Silicon, Inc.. Desert Silicon, Inc. is a global supplier of spin-on-glass (SOG) and other materials and services ... "Desert Silicon is the only supplier we use for our SOG requirements, and we are satisfied with its reliable quality, on-time ...
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Institute for Compound Semiconductors. The institute provides cutting-edge facilities to help researchers and industry work ... Ar un adeg roedd silicon yn sail ir gymdeithas wybodaeth, ond maer dechnoleg yn cyrraedd terfynau sylfaenol yn yr 21ain ... Cymhwyso gwybodaeth am led-ddargludyddion cyfansawdd i dechnegau gweithgynhyrchu silicon fydd prif ganolbwynt y fenter newydd. ... tra byddwn yn defnyddio cost a manteision graddio technoleg silicon lle mae fwyaf addas." ...
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Leti Extends 300mm Silicon-based Wafer Line. on Dec 05, 2018. News From Compound Semi Online ...
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Leti Extends 300mm Silicon-based Wafer Line. on Dec 05, 2018. News From Compound Semi Online ... University of Houston Researchers Use Machine Learning to Identify Potential Phosphor Compounds. Researchers from the ... University of Houston have demonstrated the use of machine learning to identify promising phosphor compounds. Rare-earth ...
Chemical Compounds. * Amorphous Material 54% * Strain 27% * Amorphous Silicon 26% * Nitride 18% ...
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This divergence is compounded by a cultural assault on those who have been left behind by globalization. Mitt Romney ... Meanwhile, both parties shout hosannahs to "innovation," and our political leaders make pilgrimages to Silicon Valley, a ...
The second chart shows that the total semiconductor industry growth for the past six years has been quite light - a compounded ... The odd thing is that industrial, scientific, and medical (ISM) and automotive were supposed to be growth markets for silicon ... "The second chart shows that the total semiconductor industry growth for the past six years has been quite light - a compounded ...
"I remember thinking, thats the most Silicon Valley thing ever," he says. But what did they have to lose? The two booked an ... After a few years, the hurt feelings had compounded to make their working relationship untenable. Chaisanguanthum remembered an ... Cofounder therapy belongs to a long tradition of self-betterment in Silicon Valley, alongside mindfulness meditation and ...
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  • In one embodiment, the silicon compounds are attached to the surface of a substrate comprising silica, such as a glass substrate, to provide a functionalized surface on the substrate, to which molecules, including polypeptides and nucleic acids, may be attached. (google.co.uk)
  • In one embodiment, after covalent attachment of a functionalized silicon compound to the surface of a solid silica substrate to form a functionalized coating on the substrate, an array of nucleic acids may be covalently attached to the substrate. (google.co.uk)
  • Evonik Industries and Jiangsu Zhongneng Polysilicon Technology Development Co. Ltd., a wholly owned subsidiary of GCL-Poly Energy Holdings Limited, have signed a letter of intent to establish a joint venture for the production of fumed silica and ultra-pure silicon tetrachloride in China. (coatingsworld.com)
  • Silicon tetrachloride is a byproduct of PCS production, and the joint venture will purchase this to produce AEROSIL fumed silica and Siridion STC HP ultra-pure silicon tetrachloride. (coatingsworld.com)
  • By making the planned investment we are aiming to further strengthen our market position for fumed silica and ultra-pure silicon tetrachloride and to promote growth, particularly in the attractive Chinese market,' said Klaus Engel, CEO of Evonik Industries. (coatingsworld.com)
  • This cooperation can combine Evonik's advanced technologies of producing silica and ultra-pure silicon tetrachloride with Jiangsu Zhongneng's leading technologies of silicon material production. (coatingsworld.com)
  • However, despite its abundance, terrestrial life only uses silicon as silicic acid and silica (see Appendix A ). There are no known examples of life using any other type of silicon chemistry. (mdpi.com)
  • It is used to produce high purity silicon and silica for commercial applications. (wikipedia.org)
  • In rare occurrences, the silicon dioxide in silica is converted to silicon tetrachloride when the contaminated brine is electrolyzed . (wikipedia.org)
  • Silicon tetrachloride can also be hydrolysed to fumed silica . (wikipedia.org)
  • Silicon dioxide , also known as silica , silicic acid or silicic acid anydride is an oxide of silicon with the chemical formula Si O 2 , most commonly found in nature as quartz and in various living organisms. (wikipedia.org)
  • Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. (wikipedia.org)
  • Several science fiction stories feature silicon-based life-forms--sentient crystals, gruesome golden grains of sand and even a creature whose spoor or scat was bricks of silica left behind. (scientificamerican.com)
  • silicon oxidizes to the solid silicon dioxide, called silica. (scientificamerican.com)
  • Silica, or sand is a solid because silicon likes oxygen all too well, and the silicon dioxide forms a lattice in which one silicon atom is surrounded by four oxygen atoms. (scientificamerican.com)
  • Several compounds such as silica, asbestos, silicone or, nanoparticles are built from tetrahedral units with silicon as the central atom. (hindawi.com)
  • Silica (or silicon dioxide ), as sand, is a principal ingredient of glass, one of the most inexpensive of materials with excellent mechanical, optical, thermal, and electrical properties. (americanelements.com)
  • The term "silica" denotes the compound silicon dioxide, SiO 2 . (encyclopedia.com)
  • In this reaction, silica and a carbon source (generally wood) are heated together at extremely high temperatures to yield silicon in its elemental form. (encyclopedia.com)
  • Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula SiO2, or silicon dioxide. (cdc.gov)
  • Silica compounds can be divided into two groups, crystalline (or c-silica) and amorphous silica (a-silica or non-crystalline silica). (cdc.gov)
  • c-Silica compounds have structures with repeating patterns of silicon and oxygen. (cdc.gov)
  • All forms of silica are odorless solids composed of silicon and oxygen atoms. (cdc.gov)
  • In the majority of silicates , the silicon atom shows tetrahedral coordination , with four oxygen atoms surrounding a central Si atom. (wikipedia.org)
  • The researchers first grow a thin layer of the material using molecular beam epitaxy, a process widely used in the semiconductor industry in which evaporated atoms of indium, gallium and arsenic react with each other within a vacuum to form a single-crystal compound. (cellular-news.com)
  • The scarcity of silicon-sulfur compounds in the reaction products is undoubtedly due to the instability of these compounds and to the affinity of SiF2 for atoms other than sulfur. (rice.edu)
  • After 70 years of unsuccessful attempts, several stable disilene-compounds with double bonds between silicon atoms-have now been made. (sciencemag.org)
  • A series of compounds containing up to six silicon atoms in the chain can be separated from the mixture using fractional distillation . (wikipedia.org)
  • To prepare compounds which have three silicon atoms bonded to one nitrogen atom has been difiicult and known methods require harsh conditions. (google.com)
  • Abstract We calculated the structural, elastic, and electronic properties of alkali metal Na atoms doped type-I silicon-clathrate compound (Na 8 Si 46 ) under pressure using first-principles methods. (iphy.ac.cn)
  • The calculated total and partial electron densities of states of Na 8 Si 46 indicate a weak interaction between the encapsulated Na atoms and the silicon framework. (iphy.ac.cn)
  • Each has a so-called valence of four--meaning that individual atoms make four bonds with other elements in forming chemical compounds. (scientificamerican.com)
  • At present it is preferred to employ polysiloxanyl acrylate and methacrylate esters which have a straight or branched siloxane chain containing two to four silicon atoms having methyl or phenyl substituents and one to three ethylene groups connecting the. (google.ca)
  • 6. Formation of ( h -Benzene) or ( h -Cyclohexa-1 ,3 -diene) Compounds of Chromium, Tungsten and Rhenium from Cyclohexane and the Metal atoms. (columbia.edu)
  • In the case of dichlorodimethylsilane, two chlorine atoms are available, so that a reaction with excess water produces a linear chain of ether-like linkages between silicon atoms. (wikipedia.org)
  • The chemistry of organic silicon compounds S Patai (general ed) Updates on the SiliconЦHeteroatom Bond D A Armitage (ed) Wiley Chichester 1991 540 pages 90. (docme.ru)
  • The observation by the author that there have been 300 references to silicon-nitrogen chemistry over the past three years in the RSC Specialist Reports on Organometallic Chemistry shows that there was a definite need for these chapters, if a relatively comprehensive coverage of modern organosilicon chemistry were to be achieved within the series. (docme.ru)
  • In addition to the two chapters on the reactions of silicon-nitrogen compounds, the 'Update' volume contains five other chapters on silicon-heteroatom chemistry, previously published in the main volume. (docme.ru)
  • The very long lists of references in these appendices is an indication of the enormous and growing general interest in silicon chemistry. (docme.ru)
  • The 'Update' volume together with the two main volumes are of value not only to the silicon specialist but to all organic and organometallic chemists and an essential purchase for all academic libraries with a chemistry collection. (docme.ru)
  • A W P JARVIE Aston University, UK Chemistry and Technology of Silicon and Tin Proceedings of the First Asian Network for Analytical and Inorganic Chemistry International Conference on Silicon and Tin V G Kumar Das, S W Ng and M Gielen (eds) Oxford University Press, Oxford, 1992 611 pages. (docme.ru)
  • f80.00 ISBN 0 19 855580 6 In October 1989, the 1st International Chemical Conference on Silicon and Tin, which was organized by the Asian Network for Analyticd and Inorganic Chemistry (ANAIC), was held at the Institute of Advanced Studies, University of Malaya in Kuala Lumpur. (docme.ru)
  • The silicon-silicon double bond resembles in many ways the well-known carbon-carbon double bond of organic chemistry. (sciencemag.org)
  • Despite more than one hundred years of work on organosilicon chemistry, the basis for the plausibility of silicon-based life has never been systematically addressed nor objectively reviewed. (mdpi.com)
  • We assess whether or not silicon chemistry meets the requirements for chemical diversity and reactivity as compared to carbon. (mdpi.com)
  • In no environment is a life based primarily around silicon chemistry a plausible option. (mdpi.com)
  • When people speak of "silicon-based life", they are usually referring to the diverse organosilicon chemistry, and specifically chemistry in which carbon in organic molecules is replaced by silicon. (mdpi.com)
  • So why is life's use of silicon so restricted, and could a wider silicon chemistry be used in other biochemistries? (mdpi.com)
  • Cluster compounds, a new aspect of inorganic chemistry. (google.com)
  • His scientific expertise spans from semiconductor physics and chemistry to surface defect science and silicon processes for photovoltaic uses. (wiley.com)
  • Silicon can grow into a number of lifelike structures, but its chemistry makes it unlikely that it could be the basis for alien life-forms. (scientificamerican.com)
  • and silicon chemistry is not stable in aqueous, or watery, environments. (bigthink.com)
  • Under certain conditions, silicon-based chemistry might be more favorable for life than carbon-based. (bigthink.com)
  • Silicon chemistry would also be much more amenable to life in oceans of cold elements that we don't usually associate with life , such as liquid nitrogen, methane, ethane, neon, and argon. (bigthink.com)
  • It's also capable of dissolving organic compounds like water, and, unlike water, it can also dissolve some metallic ones, opening up the possibility for some more interesting chemistry to be used in living things. (bigthink.com)
  • However, little of the chemistry of silicon can be inferred from carbon, one of its closest neighbors. (encyclopedia.com)
  • French chemist Charles Friedel and U.S. chemist James Mason Crafts are credited for not only making the first compound that contained a silicon-carbon bond, but also determining the molecular weight of silicon during their years of research in this area of chemistry. (encyclopedia.com)
  • However, his strategy to name silicon-containing materials based on a nomenclature system derived from organic chemistry was lost when the silicon analog to a ketone could not be isolated. (encyclopedia.com)
  • Rochow, E. "An Introduction to the Chemistry of the Silicones. (wikipedia.org)
  • Compounds containing phosphorus. (elsevier.com)
  • x", "y" and "z" represent the mole fractions of silicon, aluminum and phosphorus respectively, present as tetrahedral units, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E of the ternary diagram which is FIG. 1. (google.es)
  • 2. The process of claim 1 wherein the silicoaluminophosphate has mole fractions of silicon, aluminum and phosphorus within the pentagonal compositional area defined by points a, b, c, d and e of the ternary diagram which is FIG. 2. (google.es)
  • Ultra high purity silicon can be doped with boron , gallium , phosphorus, or arsenic to produce silicon for use in transistors, solar cells , rectifiers, and other solid-state devices which are used extensively in the electronics industry .The name Silicon originates from the Latin word silex which means flint or hard stone. (americanelements.com)
  • The new compounds are potential Cp-transfer reagents for the synthesis of other cyclopentadienyl complexes. (uni-bielefeld.de)
  • On the skin, it is suggested that silicon is important for optimal collagen synthesis and activation of hydroxylating enzymes, improving skin strength and elasticity. (scielo.br)
  • It is the ribonucleotide of hypoxanthine and is the first compound formed during the synthesis of purine in organisms. (britannica.com)
  • American Elements customers use high purity silicon dioxide in the production optical glasses, LED and fiber optics, solar panels, semiconductor diffusion barriers and fillers, thermal spray coatings, and the synthesis of ultra high purity silicon metal via Czochralski crystal growth or evaporation. (americanelements.com)
  • Methyltrichlorosilane results from the direct process of chloromethane with elemental silicon in the presence of a copper catalyst, usually at a temperature of at least 250 °C. 2 CH3Cl + Si → (CH3)4−nSiCln + other products While this reaction is the standard in industrial silicone production and is nearly identical to the first direct synthesis of methyltrichlorosilane, the overall process is inefficient with respect to methyltrichlorosilane. (wikipedia.org)
  • doi:10.1002/14356007.a24_021 Rochow, E. The Direct Synthesis of Organosilicon Compounds. (wikipedia.org)
  • Silicon tetrachloride is prepared by the chlorination of various silicon compounds such as ferrosilicon , silicon carbide , or mixtures of silicon dioxide and carbon. (wikipedia.org)
  • Uptake of amorphous silicon dioxide, in high doses, leads to non-permanent short-term inflammation, where all effects heal. (wikipedia.org)
  • American Elements manufactures high purity (5N, 99.999%) silicon dioxide powder (also referred to as High grade quartz or HPG) in solar, electronics, optical, and semiconductor grades suitable for exacting requirements of emerging technologies. (americanelements.com)
  • Minimizing impurities in American Elements silicon dioxide powder make it suitable for use as a reference standard for XRD and impurity testing. (americanelements.com)
  • Chlorosilanes react with water to produce hydrogen chloride, giving siloxanes and eventually silicon dioxide. (wikipedia.org)
  • Although many of the techniques applied by the team are already used in silicon fabrication, they have only rarely been used to make compound semiconductor transistors. (cellular-news.com)
  • But when you are talking about integrating billions of tiny transistors onto a chip, then we need to completely reformulate the fabrication technology of compound semiconductor transistors to look much more like that of silicon transistors,' del Alamo says. (cellular-news.com)
  • While low purity, cheap silicon carbide powder is widely used in as abrasive and cutting tool components, products with high purity could be applied in areas such as semiconductor industries. (geebeefoto.nl)
  • The produced polysilicon is used as wafers in large amounts by the photovoltaic industry for conventional solar cells made of crystalline silicon and also by the semiconductor industry. (wikipedia.org)
  • Build compound semiconductor devices on silicon substrates. (semiconductor-today.com)
  • Regarding the first challenge, to grow working devices Intel first grows a buffer layer to absorb most of the lattice mismatch between the compound semiconductor and the silicon (which produces the defects that degrade device performance). (semiconductor-today.com)
  • The creation of an impurity into silicon as a semiconductor boosts it into comprehensive conduction. (chitoku.net)
  • In the case of trimethylsilyl chloride, the hydrolyzed product is hexamethyldisiloxane: 2 ((CH3)3SiCl + H2O → [(CH3)3Si]2O + 2 HCl The analogous reaction of dimethyldichlorosilane gives siloxane polymers or rings: n (CH3)2SiCl2 + n H2O → [(CH3)2SiO]n + 2n HCl Silicon tetrachloride and trichlorosilane are intermediates in the production of ultrapure silicon in the semiconductor industry. (wikipedia.org)
  • The reactions of silicon difluoride with several sulfur containing compounds have been investigated in an attempt to synthesize compounds containing the silicon-sulfur bond. (rice.edu)
  • Of the previous reactions of silicon difluoride with sulfur compounds, only two, the hydrogen sulfide and sulfur reactions, produced compounds containing silicon-sulfur bonds. (rice.edu)
  • It may be possible to produce compounds of this sort by reacting SiF2 with thiocarbonyl compounds and sulfur monohalides or by reacting gaseous SiS or SiS2 with various reagents. (rice.edu)
  • Compounds containing sulfur. (elsevier.com)
  • Compounds wherein the metal is bonded directly to the singly bonded chalcogen of a group, in which the X's are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), which group is additionally attached directly or indirectly to the six-membered hetero ring by nonionic bonding. (uspto.gov)
  • Compounds wherein the metal is bonded directly to a chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is attached directly or indirectly to the six-membered hetero ring by nonionic bonding. (uspto.gov)
  • chlorine and potassium (from the flux added before soldering), and sulfur and silicon, indicating that these elements were integral to the soldering process. (cdc.gov)
  • Compounds which contain silicon-nitrogen bonds are known. (google.com)
  • Compounds which contain a piperidine ring, i.e., a six-membered hetero ring consisting of one ring nitrogen and five ring carbons with no double bonds between ring members. (uspto.gov)
  • We wanted to know, and discovered that enzymes that forge carbon-silicon bonds could be evolved in a test tube . (newscientist.com)
  • All of these compounds are built from tetrahedral units with silicon as the central atom and are basically extended networks based on Si-O-Si bonds [ 3 ]. (hindawi.com)
  • Scientists at Caltech have "bred" a bacterial protein with the ability to make silicon-carbon bonds, with applications in several industries - something only chemists could do before. (kurzweilai.net)
  • Organosilicon compounds contain carbon-silicon bonds. (bigthink.com)
  • The number of potting compound formulations on the market is as varied as their potential applications. (epicresins.com)
  • Epic S7281 is a two-component aliphatic polyurethane potting compound designed with a fast cure and convenient 1:1 mix ratio by volume. (epicresins.com)
  • Mechanistic studies of hydrosilylation using an optically active silane substrate, R-(+)-methyl-(1-naphthyl)phenylsilane, proceeded with predominant stereochemical retention at silicon, consistent with a carbonyl activation pathway. (osti.gov)
  • The also preferred are those silicon compounds in which a is 0, c is 3, R12 is branched alkyl or cycloalkyl, containing optionally a heteroatom, and R13 is methyl, for example, cyclohexyltrimethoxysilane and the like. (allindianpatents.com)
  • The also preferred are those silicon compounds in which a is 0, c is 3, R 12 is branched alkyl or cycloalkyl, containing optionally heteroatom, and R 13 is methyl, for example, cyclohexyltrimethoxysilane and the like. (justia.com)
  • Silanes, siloxanes, and silicones are commercially produced from silicon and methyl chloride in a process known as the "direct reaction" or the "Rochow-Muller direct process. (encyclopedia.com)
  • This reaction yields methylchlorosilanes (silicon compounds containing both methyl groups and chlorine). (encyclopedia.com)
  • A method of preparing poly(methyl- or ethyl-silyne) and silicon carbide ceramics therefrom. (wikipedia.org)
  • As outlined by Hornbostel, Silicon oxides are widely-used as design components. (chitoku.net)
  • Silicon must be freed from its oxides through a chemical process known as carbothermic reduction. (encyclopedia.com)
  • Beaver Lapping Compound is a silicon carbide grease base lapping compound. (geebeefoto.nl)
  • 600-Grit Lapping Compound - E-Z Bore, Inc. (geebeefoto.nl)
  • Our endless aisle includes a loctite lapping compound and so much more! (kine-licht.be)
  • In particular, in propylene polymerization, catalyst systems comprising the silicon ether compounds as external electron donor component exhibit good hydrogen response, and can be used to prepare polymer having high isotacticity at high yield. (allindianpatents.com)
  • However, the inventors have surprisingly found that, when used as external electron donor in olefins polymerization, especially in propylene polymerization, silicon ether compounds of general formula (I), which will be described in detail hereinbelow, exhibit good properties, for instance, the catalyst systems exhibit good hydrogen response, and can be used to prepare polymer having high isotacticity at high yield. (allindianpatents.com)
  • Other compounds of carbon, hydrogen and oxygen. (elsevier.com)
  • Compounds of carbon are classified as organic when carbon is bound to hydrogen. (britannica.com)
  • They are prepared by the Müller-Rochow process, which involves treating silicon with hydrogen chloride at elevated temperatures in the presence of a copper catalyst. (wikipedia.org)
  • Chlorosilanes obtained from crude silicon are purified by fractional distillation techniques and then reduced with hydrogen to give silicon of 99.999999999% purity. (wikipedia.org)
  • Wittig reagents, Horner-Wadsworth-Emmons reagents and other reagents for converting carbonyl compounds to olefins are listed. (tcichemicals.com)
  • Acetals convert to carbonyl compounds. (wikipedia.org)
  • Thus, methyltrichlorosilane can be used to remove acetal protecting groups from carbonyl compounds under mild conditions. (wikipedia.org)
  • Although the direct reaction is used to commercially produce silicon-based materials today, the first example of an organosilicon compound (a material containing a silicon-carbon bond) was described in 1863 (as the U.S. Civil War raged and author Mark Twain was just beginning his literary career). (encyclopedia.com)
  • Methyltrichlorosilane, also known as trichloromethylsilane, is an organosilicon compound with the formula CH3SiCl3. (wikipedia.org)
  • Methanol converts it to trimethoxymethylsilane: MeSiCl3 + 3 CH3OH → MeSi(OCH3)3 + 3 HCl Reduction of methyltrichlorosilane with alkali metals forms a highly crosslinked material called poly(methylsilyne): n MeSiCl3 + 3n Na →[MeSi]n + 3n NaCl The reaction illustrates the susceptibility of silicon halides to reductive coupling. (wikipedia.org)
  • Effect of silicate and modified aluminosilicate compounds on Cd and Zn toxicity for some crops. (degruyter.com)
  • Silicate compounds that have SiO 4 -4 units also exist in such minerals as feldspars, micas, zeolites or talcs. (scientificamerican.com)
  • But despite years of work--and despite all the reagents available to the modern alchemist--many silicon analogs of carbon compounds just cannot be formed. (scientificamerican.com)
  • 1 (lb) pound can -- Loctite/Clover brand 600 grit - 4A - Silicon Carbide Grease Mix - Super Fine Lapping and Grinding Compound Clover brand compounds have been the choice of mechanics for over 80 years. (geebeefoto.nl)
  • LOCTITE® Clover® Silicon Carbide Grease Mix is the most widely used. (kine-licht.be)
  • Clover Silicon Carbide Grease Mix Is A Standard Abrasive Paste For Fast Metal Removal. (kine-licht.be)
  • The present invention relates to silicon ether compounds having a general formula (I), a method for the preparation thereof and use thereof as a component of catalysts for polymerization of olefins. (allindianpatents.com)
  • In the prior art, 2,2-dihydrocarbyl-1-hydrocarbyloxy-3-(trihydrocarbylsilyloxy)propane compounds have never been used as external electron donor compounds in olefins polymerization. (allindianpatents.com)
  • The process for the production of light olefins from a feedstock comprising at least an aliphatic hetero compound comprising contacting said feedstock with a silicoaluminophosphate molecular sieve of U.S. Pat. (google.es)
  • Electron transfer from cyclic silicon compounds to photo-excited C 60 in polar solvents has been investigated by laser photolysis with observation of the transient absorption bands in the near-IR region. (elsevier.com)
  • an especially prominent difference was observed for four-membered cyclic compounds. (elsevier.com)
  • Chlorosilanes are a group of reactive, chlorine-containing chemical compounds, related to silane and used in many chemical processes. (wikipedia.org)
  • Each such chemical has at least one silicon-chlorine bond. (wikipedia.org)
  • Silicon tetrachloride or tetrachlorosilane is the inorganic compound with the formula SiCl 4 . (wikipedia.org)
  • The parent chlorosilane is Silicon tetrachloride (SiCl 4). (wikipedia.org)
  • Silicone Rubber Compound for Molding Keypad Bracelet Silicone Rubber Seal Description RUI-HE 6250-60M® is a type of hard silicone with hardness Shore A 60. (spintoband.com)
  • videoId:"I2BOIpfIibA",idContainer:"#AovaJjF"}) 5.0mm Gasket With Three Layers Silicone Rubber Compound Two layers Fiberglass Cloth ​ Description of Three Layers Silicone Rubber Compound Two Layers Fiberglass Cloth 1. (spintoband.com)
  • High Quality Silicone Rubber Compound for Elect. (ecvv.com)
  • it lacked any detailed account of the reactions of the silicon-nitrogen bond. (docme.ru)
  • This omission has now been rectified, in that this recent 'Update' volume includes a chapter on the silicon-nitrogen bond, together with an appendix to the Si-N chapter covering publications over the past few years. (docme.ru)
  • Silicon-nitrogen compounds. (growkudos.com)
  • The harsh conditions do not permit the preparation of silicon-nitrogen compounds with all varieties of functional groups. (google.com)
  • Compounds containing nitrogen. (elsevier.com)
  • Compounds which contain an acyclic nitrogen atom or an azide group. (uspto.gov)
  • The functionalized silicon compounds may be covalently attached to surfaces to form functionalized surfaces which may be used in a wide range of different applications. (google.co.uk)
  • Quartz forms the pure shape of silicon oxide and is also utilised in cosmetic sunglasses who are used by engineering. (chitoku.net)
  • The Clover silicon carbide paste has consistent grain size and finish qualities for most machinery appliions. (geebeefoto.nl)
  • LOCTITE® Clover Silicon Carbide Pat Gel Water Mix, paste formulation for fast metal removal. (geebeefoto.nl)
  • Loctite Clover Compound Grit 220 Fluid Abrasive 1lb. (kine-licht.be)
  • At room in your home environment, silicon is non-active with drinking water, much needed oxygen, all acids along with substances. (chitoku.net)
  • Today the term is often used as a generic for nearly all substances that contain a silicon atom. (encyclopedia.com)
  • Such versatility in formulating effective encapsulants and potting compounds leads to a range of questions, and the most commonly asked are "What about silicone-based potting compounds? (epicresins.com)
  • Polymeric forms of Al 13 and Si compounds are examples of mineral sorbents that influence metals' toxicity in the environment. (degruyter.com)
  • Silicon yields polymeric silicones, which we use to waterproof cloth or lubricate metal and plastic parts. (scientificamerican.com)
  • We have to figure out how to make these in high volumes, which would be impossible if we were limited to small GaAs wafers as starting material [150mm, compared to 300mm-diameter silicon substrates]. (semiconductor-today.com)
  • The Solarite KM-2740 Series of RTV (Room Temperature Vulcanizing), two-component silicones offers a broad range of features with greater economy than other silicone products on the market. (adhesivesmag.com)
  • This seminar presents the range of WACKER's high-quality silicone products for silicone rubber compounding applications. (wacker.com)
  • The partnership will enhance GCL-Poly's overall competitiveness by diversifying the silicon products, better serving its main business, and meeting market demand,' said Zhu Gongshan, Chairman of GCL-Poly. (coatingsworld.com)
  • Common products contain complex mixtures of Endocrine-disrupting compounds and asthma-related compounds. (ctdbase.org)
  • 153 silicon carbide paste products are offered for sale by suppliers on Alibaba A wide variety of silicon carbide paste options are available to you, There are 154 suppliers who sells silicon carbide paste on Alibaba, mainly loed in Asia. (geebeefoto.nl)
  • Bluestar Silicones and Basoğlu Kablo join forces to create a rubber compounding center in Turkey to serve customers with technical products adapted to local requirements. (elkem.com)
  • We doesn't provide silicone rubber compounding products or service, please contact them directly and verify their companies info carefully. (spintoband.com)
  • Diversified application of Silicon-centred systems in businesses, consumer electronics and personal computers, products in the home, textiles, construction, and cars will make it one of many superb crucial elements inside globe now. (chitoku.net)
  • Molecules with silicon-carbon ( organosilicon ) compounds are found in pharmaceuticals and many other products, including agricultural chemicals, paints, semiconductors, and computer and TV screens. (kurzweilai.net)
  • See more Silicon products. (americanelements.com)
  • Each day, we unknowingly come into contact with scores of products that contain silicones for the very special properties that they possess. (encyclopedia.com)
  • They are distilled (purified), and the isolated dimethyldichlorosilane is hydrolyzed to give siloxanes and silicones. (encyclopedia.com)
  • A persistent contender as an alternative elemental basis for life is silicon, mainly due to the chemical analogies between silicon and carbon. (mdpi.com)
  • Commercially, it has many uses, and it is the only source of elemental silicon. (encyclopedia.com)
  • 7/10/2015· Silicon Carbide Grit is the hardest abrasive media. (geebeefoto.nl)
  • Silicon carbide is a very sharp pointed abrasive grain that continually breaks down to leave a fine finish. (geebeefoto.nl)
  • Resin Compound Synthetic Frankfurt Abrasive is bonded with both resin and silicon carbide for marble grinding and polishing. (geebeefoto.nl)
  • With coined advantage of resin and silicon carbide, this compound Frankfurt abrasive is more adaptable to all hardness marble materials and makes more aggressive grinding and polishing on marble surfaces, resulted in honed marble surface. (geebeefoto.nl)
  • 3M™ Finesse-It™ Marine Paste Compound brings the appearance of boats back to life by the use of aggressive abrasive mineral to cut through heavy oxidation and chalky film to renew faded gelcoats. (3m.com)
  • The abrasive mineral in the compound also allows you to remove minor scratches, rust and exhaust stains from gelcoat finishes. (3m.com)
  • Apply the compound and rub it in a circular motion to allow the abrasive mineral to cut through oxidation, grime and filmy residue. (3m.com)
  • Basoğlu Kablo being in the silicone rubber business for over 20 years and having acquired all the necessary technical information and equipment will be offering in Turkey and surrounding territories compounded HCR for highly technical applications based on the knowhow and expertise of Bluestar Silicones Mix & Fix centers. (elkem.com)
  • Ultra-pure silicon tetrachloride, marketed under the Siridion® STC HP brand name, is used in the fiber optics needed to expand China's communications and IT infrastructure. (coatingsworld.com)
  • The growth rate for ultra-pure silicon tetrachloride in China is well above the growth rate for the global market. (coatingsworld.com)
  • Silicon tetrachloride is a classic electrophile in its reactivity. (wikipedia.org)
  • Silicon tetrachloride is used as an intermediate in the manufacture of polysilicon , a hyper pure form of silicon, [3] since it has a boiling point convenient for purification by repeated fractional distillation . (wikipedia.org)
  • Silicon tetrachloride reappears in both these two processes as a by-product and is recycled in the hydrogenation reactor. (wikipedia.org)
  • High purity silicon tetrachloride is used in the manufacture of optical fibres. (wikipedia.org)
  • dichlorosilane (H2SiCl2) and silicon tetrachloride (SiCl4) are obtained as byproducts. (wikipedia.org)
  • Bluestar Silicones believes that this new cooperation will be a milestone for the silicone rubber business in Turkey and will serve as a springboard for the promotion of the compounds in nearby countries. (elkem.com)
  • All silicone rubber compounding wholesalers & silicone rubber compounding manufacturers come from members. (spintoband.com)
  • 12 Inch 14 Inch Automatic nip adjustment silicone rubber mixing mill / open mixing mill / rubber compound two roll mill Brief description: 1. (spintoband.com)
  • the blocked mercaptosilanes can be used in rubber compounds. (freepatentsonline.com)
  • To expand the possibility of plausible silicon biochemistry, we explore silicon's chemical complexity in diverse solvents found in planetary environments, including water, cryosolvents, and sulfuric acid. (mdpi.com)
  • Poly(methylsilyne) is soluble in organic solvents, and can be applied to surfaces before being pyrolyzed to give the ceramic material, silicon carbide. (wikipedia.org)
  • Silicon shares many similarities with carbon and is, in the form of various silicates in rocks, the second most abundant element (after oxygen) in Earth's crust [ 8 ]. (mdpi.com)
  • This epoxy system coines the abrasion resistance qualities of both large and small ceramic beads and silicon carbide. (kine-licht.be)
  • They give an excellent overview of current research into many areas of tin and silicon, encompassing both inorganic and organometallic derivatives and fundamental and applied studies. (docme.ru)
  • Since the discovery of hydroformylation by O. Roelen in 1938, catalytic applications have paved the way of organometallic compounds in industry. (wiley.com)
  • One such material is the compound indium gallium arsenide, which is already used in fiber-optic communication and radar technologies, and is known to have extremely good electrical properties, del Alamo says. (cellular-news.com)
  • But despite recent advances in treating the material to allow it to be formed into a transistor in a similar way to silicon, nobody has yet been able to produce devices small enough to be packed in ever-greater numbers into tomorrow's microchips. (cellular-news.com)
  • Electronic potting and encapsulating compounds supplied by Epic Resins are formulated to provide consistent material performance to achieve the most exacting electronic potting application properties. (epicresins.com)
  • With worldwide operations headquartered in Lyon, France, Bluestar Silicones is a $650 million worldwide silicones raw material manufacturer. (elkem.com)
  • No. 3,681,266, a distinct class of acylaminoorganosilicon compounds was fluorine modified to provide a coating material that is useful as a water repellant. (google.com)
  • No. 3,720,699, a new and useful class of haloorganoacylaminoorganosilicon compounds are reported to be useful as a coating material. (google.com)
  • Your absolutely pure and impure style of silicon is inflexible and complicated, a good reason why it can be popular being a establishing material. (chitoku.net)
  • Because our compound doesn't dry out too quickly, it allows a greater area to be compounded with less material. (3m.com)
  • Bouncing Putty, later sold as Silly Putty ® , is an example of a silicon-based material with very unusual properties. (encyclopedia.com)
  • In the sub-cohorts of the ferrosilicon/silicon metal and silicon carbide industries, the differences between oven operators and non-exposed workers were -2.3 (-4.3 to -0.3) and -5.6 (-10.4 to -0.7) mL/(m 2 ) x year), respectively. (ilo.org)
  • The metalloid is rarely found in pure crystal form and is usually produced from the iron-silicon alloy ferrosilicon. (americanelements.com)
  • Silicon carbide tubes served as components in industrial furnaces and thermal couple protectors, and components made by silicon carbide are replacing metal parts in some turbo engines. (geebeefoto.nl)
  • The main advantage of silicone potting compounds is the material's elevated thermal resistance (over 160°C) while offering a soft polymer. (epicresins.com)
  • When any one enzyme "mates" with compounds it is helping to react, the two molecular shapes fit together like a lock and key, or a shake of hands. (scientificamerican.com)
  • Directions on project I'm doing call for silicon grease. (diyaudio.com)
  • An internal electron donor compound for preparing .alpha. (patents.com)
  • and external electron donor component, typically organo-silicon compound. (allindianpatents.com)
  • At present, the types of external electron donor compounds have developed from initial benzoates to current organosiloxane. (allindianpatents.com)
  • It is noted that, among the silicon compounds having the general formula R11aR12bSi(OR13)c, those silicon compounds in which c is 1 are generally not deemed as good external electron donor. (allindianpatents.com)
  • The rate constant (k et ) and quantum yield (Φ et ) of electron transfer decrease with an increase in the number of silicon units. (elsevier.com)
  • We've previously shown that you could achieve more than 10x improvement in power for an InSb device operating at 0.5V compared to the equivalent silicon device [reported at December 2005's IEEE International Electron Devices Meeting]," he says. (semiconductor-today.com)
  • Consequently, earlier this month Intel reported the fabrication of what Mayberry claims are the first high-performance compound devices on silicon (IEEE Electron Device Letters, Vol. 28, No. 8, August 2007, pp.685). (semiconductor-today.com)

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