TY - JOUR. T1 - Laboratory aspects of zirconia restorations. AU - Millen, Christopher. AU - Bhatia, Krishnakant. AU - Ibbetson, Richard. PY - 2012/6. Y1 - 2012/6. N2 - UNLABELLED: Zirconia restorations are now accepted and commonly prescribed in dentistry. However, these materials undergo hydrothermal ageing which can reduce their clinical performance. Appropriate handling is essential to limit the restorations susceptibility to low temperature degradation/ageing. Through appropriate clinical prescribing and laboratory manufacture, an aesthetic, strong and long-lasting restoration can be fabricated.CLINICAL RELEVANCE: This article will inform the reader about zirconia as a dental material as well as how best to handle a zirconia restoration.. AB - UNLABELLED: Zirconia restorations are now accepted and commonly prescribed in dentistry. However, these materials undergo hydrothermal ageing which can reduce their clinical performance. Appropriate handling is essential to limit the restorations ...

The production methods for dental ceramics have improved greatly over the years . Increased proportion of crystalline particles has led to higher resistance to functional loads, but also changed the optical properties of the material . An yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) popularly called zirconia has been the most common dental high-strength ceramic for some years. Y-TZP contains only polycrystalline particles in a metastable tetragonal crystal structure, and is the dental ceramic material with the highest fracture strength available today . Dental zirconias are mainly used for crowns, fixed dental prostheses and implant components. The strength of zirconia depends on the density of the polycrystalline particles and quality of the product . The manufacturing process among the zirconia restorations differs with regard to material composition, processing and machining process of the milling blanks . The machining process can be hard-machining or soft-machining. The ...

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Mucosal seal formation around dental abutments is critical to the successful integration of dental implants into the human oral cavity. No information exists for how clinically relevant polishing procedures for computer-aided design and computer-aided manufactured (CAD/CAM) zirconia abutments affects cellular responses important to mucosal seal formation. CAD/CAM zirconia was divided into four groups for clinically relevant polishing utilizing commercial polishing heads: control, coarse, coarse plus medium, and coarse plus medium plus fine. Surfaces were analyzed with scanning electron microscopy (SEM), atomic force microscopy (AFM), and optical profilometry (OP). Subsequently, human gingival fibroblasts (HGFs) were seeded onto the zirconia surfaces. Proliferation was measured via a quantitative SEM technique and focal adhesion kinase (FAK) phosphorylation status was measured by an enzyme-linked immunosorbent assay (ELISA). Results showed an increase in proliferation on all polished surfaces as compared

YB66 was discovered in 1960[17] and its structure was solved in 1969.[16] The structure is face-centered cubic, with space group Fm3c (No. 226), Pearson symbol cF1936 and lattice constant a = 2.3440(6) nm. There are 13 boron sites B1-B13 and one yttrium site. The B1 sites form one B12 icosahedron and the B2-B9 sites make up another icosahedron. These icosahedra arrange in a thirteen-icosahedron unit (B12)12B12 which is called supericosahedron. The icosahedron formed by the B1 site atoms is located at the center of the supericosahedron. The supericosahedron is one of the basic units of the boron framework of YB66. There are two types of supericosahedra: one occupies the cubic face centers and another, which is rotated by 90°, is located at the center of the cell and at the cell edges. Thus, there are eight supericosahedra (1248 boron atoms) in the unit cell.[15] Another structure unit of YB66 is B80 cluster of 80 boron sites formed by the B10 to B13 sites.[15] All those 80 sites are partially ...

YTTRIUM [symbol, Y; atomic weight, 89.0 (O = 16)], a metallic chemical clement. In its character yttrium is closely allied to, and in nature is always associated with, cerium, lanthanum, didymium and erbium (see Rare Earths). For the preparation of yttrium compounds the best raw material is gadolinite, which, according to König, consists of 22.61% of silica, 34.64 of yttria, Y2O3, and 42.75 of the oxides of erbium, cerium, didymium, lanthanum, iron, beryllium, calcium, magnesium and sodium. The extraction (as is the case with all the rare earths) is a matter of great difficulty. Metallic yttrium is obtainable as a dark grey powder by reducing the chloride with potassium, or by electrolysing the double chloride of yttrium and sodium. It decomposes water slowly in the cold, and more rapidly on heating. Yttria, Y2O3, is a yellowish white powder, which at high temperatures radiates out a most brilliant while light. It is soluble, slowly but completely, in mineral acids. It is recognized by its very ...

Purpose: To determine the degree of conversion (DC), physicochemical properties, and microshear bond strength (mu SBS) of experimental self-adhesive resin cements (SARCs) to dentin and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Materials and Methods: Dual-curing cements were formulated with UDMA, HEMA, bis-GMA, and TEG-DMA as the organic matrix. 2MP (bis 2-(methacryloyloxy)-ethyl-phosphate) and GDMAP (1,3-glycerol dimethacrylate phosphate) were added to impart self-adhesive characteristics. A control group was formulated without self-etch methacrylates. Silanized particles were incorporated. Photoactivation was carried out using an LED light-curing unit (1200 mW/cm(2)) for 20 s. Infrared spectroscopy assessed the DC immediately and after 24 h. pH was analyzed in real time and recorded after 48 h. Water sorption (W-sp), water solubility (W-sl), and film thickness measurements followed ISO 4049. mu SBS of the cements to dentin and Y-TZP was evaluated immediately and after 3 ...

TY - JOUR. T1 - Low-temperature performance of yttria-stabilized zirconia prepared by atomic layer deposition. AU - Jang, Dong Young. AU - Kim, Ho Keun. AU - Kim, Jun Woo. AU - Bae, Kiho. AU - Schlupp, Meike V F. AU - Park, Suk Won. AU - Prestat, Michel. AU - Shim, Joon Hyung. PY - 2015/1/15. Y1 - 2015/1/15. N2 - We report on the performance of thin-film yttria-stabilized zirconia (YSZ) synthesized by atomic layer deposition (ALD) at temperatures of 50-525 °C. Electrochemical impedance spectroscopy (EIS) was used for conductivity measurements. Relatively high conductivity values were observed in the low-temperature region when compared to reference values of YSZ synthesized by other methods. To investigate the conduction mechanism, various experimental variables were modified during the electrical measurements, including the ratio of yttria to zirconia in the ALD YSZ films and the atmospheric conditions. To relate the electrical properties to the structural characteristics, the crystallinity ...

Ceramic abrasive grits comprising alpha alumina and at least about 0.5 percent by weight yttria are prepared by mixing an aqueous dispersion of alpha alumina monohydrate and yttrium compound, gelling the resultant mixture, drying the gel to produce a dried solid, crushing the dried material to produce grits, calcining the dried grits to substantially remove bound volatile materials, and firing the grits to produce a ceramic material. The yttrium for the most part is in the form of a yttrium aluminum garnet. Abrasive products comprising the abrasive grits are also claimed as is a method of grinding a workpiece with such abrasive products.

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Calcium silicide (CaSi2), also called calcium disilicide, is an inorganic compound, a silicide of calcium. It is a whitish or dark grey to black solid matter with melting point 1033 °C. It is insoluble in water, but may decompose when subjected to moisture, evolving hydrogen and producing calcium hydroxide. Decomposes in hot water. It is flammable and may ignite spontaneously in air. Its CAS number is 12013-56-8. Industrial calcium silicide usually contains iron and aluminium as the primary contaminants, and low amounts of carbon and sulfur. Calcium silicide is used for manufacture of special metal alloys, e.g. for removing phosphorus and as a deoxidizer. In pyrotechnics, it is used as fuel to make special mixtures, e.g. for production of smokes, in flash compositions, and in percussion caps. Specification for pyrotechnic calcium silicide is MIL-C-324C. In some mixtures it may be substituted with ferrosilicon. Silicon-based fuels are used in some time delay mixtures, e.g. for controlling of ...

Yttrium Chloride (YCl3.6H2O) Powder - Yttrium(III) chloride is an inorganic compound of yttrium and chloride. It exists in two forms, hydrate (YCl3(H2O)6) an...

Get information, facts, and pictures about yttrium at Encyclopedia.com. Make research projects and school reports about yttrium easy with credible articles from our FREE, online encyclopedia and dictionary.

Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get them in front of Issuus millions of monthly readers. Title: A Holistic Framework on Information Systems Evaluation with a Case Analysis, Author: Academic Conferences and publishing International, Name: A Holistic Framework on Information Systems Evaluation with a Case Analysis, Length: 8 pages, Page: 1, Published: 2011-04-17

PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.

Abstract Objectives The purpose of this in vitro study was to compare the centric and eccentric quasi-static and fatigue fracture strength of industrially prefabricated resin-bonded three-unit inlay-retained fixed dental prostheses (IPIRFDPs). The IPIRFDPs consisted of industrial manufactured yttria-stabilized tetragonal zirconia (Y-TZP) frameworks with an industrially added microhybrid composite veneering. Methods Identical IPIRFDP-models consisted of a…

Yttrium oxide, also known as yttria, is Y2O3. It is an air-stable, white solid substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds Y2O3 is widely used to make Eu:YVO4 and Eu:Y2O3...

Feature of Silicide aluminum powder Item Appearance Si Average size AlSi2 black powder 50-51% 1-10um 99.5% 、60-325mesh 99.5% or custom-made Application of Silicide aluminum powder Used as powder metallurgy raw materials, aluminum silicide at high temperat

Hi all -- I asked Jun to clarify his nickel silicide process as follow up to his request a couple of weeks ago and his original request in July. Attached here is the proposed flow. I spoke with Jim McV and Jun about this. Jun agrees that he will do all the wet cleans in his own decontaminated lab ware at wbgeneral. This should, we hope, address concerns about possible contamination in the wet benches. If Ive understood correctly, this is what Jim McV recommends: Ni dep - SCT -- Jun will have to work with Ed on this. Anneal - AG4108 -- this is OK if metal silicide quartzware is used LTO dep - OK on the metal side Contact etch - OK on the amtetcher Al deposition - OK on the gryphon if pre-dep etch is not used (will have to check with Jun) The remaining issues (which I neglected to ask Jun or Jim): P5000 Al etch -- is this OK? (Presumably, no nickel silicide is exposed?) Plasma O2 clean - where? (Im presuming this is necessary) Al dep - check if Jun needs pre-dep etch How does this sound so far? ...

Here, we perform molecular dynamics simulation on cubic ZrO 2 and yttria-stabilized zirconia (YSZ) to elucidate defect cluster formation resulting from radiation damage, and evaluate the impact of Y-dopants. Interstitial clusters composed of split-interstitial building blocks, i.e., Zr-Zr or Y-Zr are formed. Moreover, oxygen vacancies control cation defect migration; in their presence, Zr interstitials aggregate to form split-interstitials whereas in their absence Zr interstitials remain immobile, as isolated single-interstitials. Y-doping prevents interstitial cluster formation due to sequestration of oxygen vacancies. ...

TY - JOUR. T1 - Synthesis of Melted Yttrium Barium Copper Oxide-0.325Ag Superconductors Contained in a Solid Silver Cladding at Reduced Oxygen Partial Pressures. AU - Lee, Haigun. AU - Park, Haiwoong. PY - 2003/11. Y1 - 2003/11. N2 - This paper presents a study on the feasibility of concurrent synthesis and melt-processing of Yttrium Barium Copper Oxide-0.325 Ag (Y123-Ag) superconductor by thermo-mechanical processing of the silver-clad precursor containing BaCuO2.5 at reduced oxygen partial pressures. At 950-955°C the melted Y123-Ag superconductor was contained in a solid silver cladding which melted at 960-965°C. After 15 min at 950-965°C and oxygen partial pressures of 0.28 and 0.55 kPa, melted orthorhombic Y123-Ag formed. On extending the heat-treatment from 15 to 30 min, the orthorhombic Y123-Ag changed to tetragonal Y123-Ag which was supported directly by a series of rapid-heat, soak, and rapid-cool experiments at 950°C (PO2 = 0.28 kPa), and thus direct formation of orthorhombic ...

Mountains Necklace with Yttrium Fluorite Cloud Sterling Silver + Yttrium Fluorite Height: 1.5 Width: 1.5 Sterling Silver Chain: 18

Background: Dental caries is a multifactorial disease in which microorganisms play an important role. Recently, herbs have been tried as mouthrinses to combat the side effects of chemical mouthrinses. The anticaries efficacy of Sodium fluoride, Tulsi leaf, and Black myrobalans fruit extracts on Streptococcus mutans (S. mutans) have been reported in the literature, but no comparative study has been done yet. Aim: This study aims to observe the change in the pH of saliva and to assess the efficacy of the herbal rinses-Tulsi and Black myrobalans on S. mutans count while comparing it with Sodium fluoride mouthrinse. Methods: Herbal ethanolic extracts of Tulsi (4%) and Black myrobalans (2.5%) were prepared as mouthrinses and compared with sodium fluoride mouthrinse (0.05%). Sixty high caries risk patients were selected and allocated randomly into three groups [n = 20], categorized as Group A-Sodium fluoride mouthrinse, Group B-Tulsi mouthrinse, and Group C-Black myrobalans mouthrinse. They were ...

MemPro manufactures ceramic nanofibers, polymer nanofibers, and catalyst products.. Our products are never seen by the end-user but their benefits are distinguished in our customers products. Our products strengthen, protect, clean, functionalize, and enhance. With very large surface-area-to-volume ratios, mechanical strength, chemical resistance, heat tolerance, and selective filtration, our ceramic nanofibers possess all of the beneficial characteristics of advanced materials. This translates into improved performance and cost-savings while bridging the gap between conceptual ideas and products.. We continually work with customers to develop and supply new materials for innovative technologies. MemPro produces the highest quality materials backed by unrivaled knowhow.. ...

Jayasingh, EM and Tantria, TA and Bhaskaran, TA and Biswas, SK and Ramasesha, Sheela K (2002) Performance of monolithic and TiBlt;subgt;2lt;/subgt; reinforced MoSilt;subgt;2lt;/subgt; in dry sliding contact with steel. Materials Letters, 53 (4-5). pp. 379-383. Tantri, PS and Jayasingh, EM and Biswas, SK and Ramasesha, Sheela K (2002) Role of in situ generated tribofilm on the tribological characteristics of monolith and TiB2 reinforced MoSi2 intermetallic. Materials Science and Engineering A, 336 (1amp;2). pp. 64-71. Mitra, Nibedita and Vijayan, Kalyani and Bai Pramila, BN and Biswas, SK (1995) Phase Transformation Introduced by Mechanical and Chemical Surface Preparations of Tetragonal Zirconia Polycrystals. Journal of the American Ceramic Society, 76 (2). pp. 533-535. Biswas, SK and Vijayan, Kalyani (1992) Friction and wear of PTFE-a review. Wear, 158. pp. 193-211. Vijayan, Kalyani and Biswas, SK (1991) Wear of polytetrafluoroethylene: some crystallographic observations. Wear, 150. pp. ...

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Oxidation of FeCrAl(Re), when exposed to similar to 35 ppm of water as sole supply of oxygen in predominantly nitrogen atmosphere, has two characteristic signatures. One is the internal nitridation owing to chromia nodules acting windows toward nitrogen permeation locally short-circuiting the protective alpha-Al2O3 scale. The second remarkable feature is the growth of thick, apparently defect-rich alumina scale under yttria-rich nodules. Hence, one part of the present study comprises exploratory DFT calculations to discriminate between the impacts of chromia and yttria viz. nitrogen permeation. The second part concerns boundary conditions for apparent rapid growth of alumina under yttria nodules. Yttria-associated surface energy stabilization of defect-rich alumina in presence of water was argued to involve hydrolysis-driven hydroxylation of said interface. Subsequent inward growth of the alumina scale was associated with outward diffusion of oxygen vacancies to be accommodated by the remaining proton

The invented method can be used to form silicide contacts to an integrated MISFET device. Field isolation layers are formed to electrically isolate a portion of the silicon substrate, and gate, source and drain regions are formed therein. A polysilicon runner(s) that makes an electrical connection to the integrated device, is formed on the isolation layers. The structure is subjected to ion implantation to amorphized portions of the silicon gate, source, drain and runner regions. A metal layer is formed in contact with the amorphized regions, and the metal layer overlying the active region of the integrated device is selectively irradiated using a mask. The light melts part of the gate, and amorphized source and drain regions while the remaining portions of the integrated device and substrate remain in their solid phases. Metal diffuses into the melted gate, source and drain regions which are thus converted into respective silicide alloy regions. Preferably, during selective irradiation, a portion of

TY - JOUR. T1 - Mössbauer Effect in Oriented Slabs of Yttrium Iron Garnet Soviet Physics - Solid State. AU - Belozerskii, G.N.. AU - Gitsovich, V.N.. AU - Murin, A.N.. AU - Khimich, Yu.P.. AU - Yakovlev, Yu.M.. PY - 1971. Y1 - 1971. M3 - Article. VL - 12. SP - 2323. EP - 2326. JO - Physics of the Solid State. JF - Physics of the Solid State. SN - 1063-7834. IS - 19. ER - ...

Solid Zirconia or Porcelain Teeth Fused to Zirconia. To have the solid Zirconia on the upper, it is necessary to have the All on 6 implants. This is due to the weight of the Zirconia restoration and the need for the additional 2 implants. On the lower, depending on the size of the jaw, it is normally acceptable to use the All on 4 but the All .... Get Price ...

Plasma spray forming ceramic components on a mandrel provides a way of net shape forming of difficult to machine materials. In addition, the structure of plasma sprayed ceramics contains fine porosity that improves strain accommodation as compared to sintered ceramics. However, plasma spray forming causes complex stress states in materials that may lead to cracking during spraying or during separation from the mandrel. Monitoring surface temperatures by infrared videography and controlling deposit surface temperature by directed cooling can be used to minimize thermal gradients and minimize part cracking. Control of thermal stresses is also necessary for proper separation of the sprayed part from the mandrel. Details of the plasma spray forming of yttrium oxide crucibles show how temperature monitoring, directed cooling, and robot manipulation are used to produce a crack free crucible.. ...

Alfa Aesar™ Yttrium(III) oxide sputtering target, 76.2mm (3.0 in.) dia. x 6.35mm (0.250 in.) thick, 99.99% (metals basis) 1 each Alfa...

To see a rotating video of (almost) any of the samples of Yttrium from The Elements, click it below. Links will open in a new window ...

In this report, the global Yttrium market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at

Swedish chemist Carl Gustaf Mosander discovered terbium in 1843. He detected it as an impurity in yttrium oxide, Y2O3. Yttrium is named after the village of Ytterby in Sweden. Terbium was not isolated in pure form until the advent of ion exchange techniques.[13]. Mosander first separated yttria into three fractions, all named for the ore: yttria, erbia, and terbia. Terbia was originally the fraction that contained the pink color, due to the element now known as erbium. Erbia (containing what we now call terbium) originally was the fraction that was essentially colorless in solution. The insoluble oxide of this element was noted to be tinged brown. Later workers had difficulty in observing the minor colorless erbia, but the soluble pink fraction was impossible to miss. Arguments went back and forth as to whether erbia even existed. In the confusion, the original names got reversed, and the exchange of names stuck, so that the pink fraction referred eventually to the solution containing ...

Presented here is a chiral microporous metal-organic framework material with a three-fold interpenetrating diamond-type structural topology and interesting properties for selective separation. The material has a high storage capacity for CO2 gas (4.23 mmol g−1 at 273 K and 1 bar) and shows fantastic temperature-dependent selectivity for CO2 over N2. Moreover, this multifunctional material, which has a rich π system, can selectively adsorb benzene over cyclohexane at low pressure (0.05 bar) at 298 K. ...

The present invention relates to, preferably coordinated to, metal ions for absorbing, or storing, or releasing, or absorbing and storing, or absorbing and releasing, or storing and releasing or absorbing, storing and releasing one or more gases. A method of using a metal organic framework material comprising at least one coordinating organic compound, at least one metal ion and a void, and a fuel cell comprising the material for this purpose.

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The Influence of Silicon and Silicides on the Properties of Near-Alpha Titanium Alloys Neal, D. F.; Fox, S. P.; The Minerals, Metals and Materials Society ...

Magnesium Silicide (Mg2Si) Sputtering Targets. Stanford Materials Corporation (SMC) offers innovative solutions for optimal sputtering results and an efficient coating process.

This report examines international trade and worldwide market trends pertaining to hydrides, nitrides, azides, silicides and borides. The report will

Page contains details about NaYF4:Yb3+,Er3+@NaYF4@NaYF4:Nd3+ core/shell/shell nanocrystals . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com

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This 2017 report sets out recommendations for branch mismatch rules that would bring the treatment of these structures into line with the treatment of hybrid mismatch arrangements as set out in the 2015 Report on Neutralising the Effects of Hybrids Mismatch Arrangements (Action 2 Report). Branch mismatches arise where the ordinary rules for allocating income and expenditure between the branch and head office result in a portion of the net income of the taxpayer escaping the charge to taxation in both the branch and residence jurisdiction. Unlike hybrid mismatches, which result from conflicts in the legal treatment of entities or instruments, branch mismatches are the result of differences in the way the branch and head office account for a payment made by or to the branch. The 2017 report identifies five basic types of branch mismatch arrangements that give rise to one of three types of mismatches: deduction / no inclusion (D/NI) outcomes, double deduction (DD) outcomes, and indirect deduction / no

Made of pre-sintered yttria stabilized tetragonal zirconia polycrystalline ceramics, the exceptional esthetic qualities of Custom Milling Centers Pearl FC Zr® deliver a restoration that mimics natural dentition. ...

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The formation of Ni silicides has been successfully monitored by Raman spectroscopy. Ni silicides formed at different annealing temperatures using rapid thermal annealing were analyzed using Rutherford backscattering spectroscopy and X-ray diffraction. Raman spectroscopy was further used to examine these samples. The results showed that Raman spectroscopy could accurately identify the phases of Ni silicides formed at various temperatures. These findings were used to demonstrate the increased thermal stability of NiSi by the addition of Pt. This study demonstrates the applicability of Raman spectroscopy for monitoring the formation of NiSi, which was suggested to be the future silicide for deep submicrometer integrated circuit processing. Raman spectroscopy offers a unique tool for phase identification at localized areas and mapping characterization of Ni silicides with micrometer spatial resolution ...

bold{Structures and Electronic Properties of Self-assembled Pt Silicide Nanowires on Si(100)$ We investigated the formation of Pt silicide nanowires on a Si(100) surface using scanning tunneling microscopy and high-resolution photoemission spectroscopy. Pt silicide nanowires with a tetragonal Pt2Si structure are formed along the step edges of Si(100). Pt-induced c(4 $\times$ 2) reconstructions also appear adjacent to the tetragonal $Pt_2Si$ nanowires. Formation of the $Pt_2Si$ nanowires is attributed to the anisotropic lattice mismatches between the tetragonal $Pt_2Si$ structure and Si(100). Scanning tunneling spectroscopy data show that the nanowires are metallic. The stoichiometry of Pt silicide is confirmed by high-resolution photoemission spectroscopy. $\bold{Unidirectional Pt Silicide Nanowires Grown on Vicinal Si(100)}$ The formation and electronic properties of unidirectional $Pt_2Si$ nanowires grown on a Si(100)-2° off surface were investigated. We found that $Pt_2Si$ nanowires were ...

Composites containing 3 mol% yttria stabilized tetragonal zirconia (3Y-TZP) reinforced with multiwalled carbon nanotubes (CNTs) with various amounts of CNTs (3Y-TZP / X wt% CNT, X= 0, 0.5, 1.5, 3 and 5) were processed by spark plasma sintering. Microscopic analysis proves that CNTs were well dispersed and embedded in grain boundaries of the sintered body. High temperature mechanical properties have been investigated using mechanical spectroscopy and low stress (6 MPa) creep. The isothermal spectrum (measured at 1600 K) consists of a mechanical loss peak at a frequency of about 0.1 Hz, which is superimposed on an exponential increase at low frequency. The absence of a well-marked peak in monolithic 3Y-TZP is justified considering that restoring force decreases at low frequencies or high temperatures due to the elasticity of neighboring grains. Therefore, strain is no more restricted and the mechanical loss increases exponentially, which is correlated to macroscopic creep. However, with CNT ...

Page contains details about sodium yttrium fluoride-coated ytterbium, thulium-doped sodium yttrium fluoride nanocrystals incorporated into nanoimpeller particles . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com

This randomized phase III trial studies 90-yttrium ibritumomab tiuxetan and combination chemotherapy compared with combination chemotherapy alone before stem cell transplant in treating patients with diffuse large b-cell non-Hodgkin lymphoma that has returned after a period of improvement. Radioactive substances linked to monoclonal antibodies, such as 90-yttrium ibritumomab tiuxetan, can bind to cancer cells and give off radiation which may help kill cancer cells. Drugs used in chemotherapy, such as carmustine, etoposide phosphate, cytarabine, and melphalan (BEAM), work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. It is not yet known whether 90-yttrium ibritumomab tiuxetan and BEAM before a stem cell transplant are more effective than BEAM alone in treating patients with diffuse large b-cell non-Hodgkin lymphoma.. ...

0078]Afterwards, a thermal oxidation barrier 490 may be formed on the patterned metal layer, the metal silicide layer, or the double layer thereof 480. An annealing process is then performed to remove the metal catalyst for crystallization remaining in the semiconductor layer 420, particularly, the metal catalyst remaining in the channel region 422 of the semiconductor layer 420. When the annealing process is performed, a metal of the metal layer combines with silicon of the semiconductor layer 420 at the surface of the semiconductor layer 420 in contact with the metal layer pattern, the metal silicide layer pattern, or the double layer pattern thereof 480 to form a metal silicide, and/or the metal silicide of the metal silicide layer pattern is diffused into the region of the semiconductor layer 420 in contact with the patterned metal layer, metal silicide layer, or double layer thereof 480. Accordingly, a region 420a, in which a metal silicide different from the metal silicide formed from the ...

In this study, the application of a calcium-based bifunctional catalyst/sorbent is investigated in modified chemical looping steam methane reforming (CLSMR) process for in situ CO2 sorption and H2 production. The yttrium promoted Ca-Co samples were synthesized and applied as bifunctional catalysts/sorbent. The influence of reduction temperature (500-750 °C), Ca/Co and Ca/Y ratios (1.5-∞ and 3-18, respectively) and catalyst life time are determined in CLSMR process. The physicochemical transformation of fresh, used and regenerated samples after 16 redox cycles are determined using X-ray powder diffraction (XRD), N2 adsorption-desorption, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM) techniques. The effect of yttrium promoter on the structure of catalyst and regeneration step on the reversibility of bifunctional catalyst/sorbent was two important factors. The characterization results revealed that the presence

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0055] In this step, only an upper portion of the Si layers 16 and 26 are silicided. Accordingly, the Si layers 16 remain between the SiGe layers 15 and the silicide layers 17, and the Si layers 26 remain between the SiGe layers 25 and the silicide layers 27. The conductivity type impurities in the silicided portions of the Si layers 16 and 26 are extruded to the non-silicided portions by the forming of the silicide layers 17 and 27, and the SiGe layers 15 and 25 suppress diffusion of the extruded conductivity type impurities. As a result, the conductivity type impurities are concentrated into the Si layers 16 between the SiGe layers 15 and the silicide layers 17 and into the Si layers 26 between the SiGe layers 25 and the silicide layers 27, thereby decreasing contact resistances at the interfaces between the silicide layers 17 and the Si layers 16 and at the interfaces between the silicide layers 27 and the Si layers 26 ...

Mr. Speaker, I rise today to speak to private members bill, Bill C-211, an act respecting a federal framework on post-traumatic stress disorder.. Mental health is a state of well-being in which every individual realizes his or her own potential, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community. Improving the mental health of all people living in Canada is a priority for the federal government, which is one of the reasons why this government will be supporting Bill C-211 with amendments and we will work to address those at committee stage.. The Minister of Health continues to engage provincial and territorial governments to deliver on important investments in health, with mental health as a priority area of focus.. On December 19, 2016, the Government of Canada offered to give the provinces and territories approximately $11 billion over 10 years for mental health care and home care in addition to $544 ...

Mr. Speaker, I rise today to speak to private members bill, Bill C-211, an act respecting a federal framework on post-traumatic stress disorder.. Mental health is a state of well-being in which every individual realizes his or her own potential, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community. Improving the mental health of all people living in Canada is a priority for the federal government, which is one of the reasons why this government will be supporting Bill C-211 with amendments and we will work to address those at committee stage.. The Minister of Health continues to engage provincial and territorial governments to deliver on important investments in health, with mental health as a priority area of focus.. On December 19, 2016, the Government of Canada offered to give the provinces and territories approximately $11 billion over 10 years for mental health care and home care in addition to $544 ...

The recent discovery of the quantum anomalous Hall effect (QAHE) in magnetically doped topological insulators cooled below in the milikelvin regime represents breakthrough in the field of spintronics(1). Theoretically, the QAHE should occur in graphene proximity coupled to a ferromagnetic insulator(2) but with the promise of much higher operating temperatures for practical applications. Hints of proximity-induced magnetism in graphene coupled to yttrium iron garnet (YIG) films have been reported (3) although the QAHE remains unobserved; the lack of a fully developed plateau in graphene/YIG devices can be attributed to poor interfacial coupling and therefore a dramatically reduced magnetic proximity effect. Here we report the deposition and characterisation of epitaxial thin-films of YIG on lattice-matched gadolinium gallium garnet substrates by pulsed laser deposition. Pristine exfoliated graphene flakes transferred mechanically onto the YIG are reported alongside results that correlate the effects

W-Y2O3composite nanopowders prepared via wet chemical method exhibit unique morphologies and microstructures. The yttrium addition during chemical reaction process affects not only the composition...

Demand is increasing for the determination of the rare-earth elements (REE) and yttrium in geologic materials. Due to their low natural abundance in many materials and the interferences that occur in many methods of determination, a separation procedure utilizing gradient strong-acid cation-exchange chromatography is often used to preconcentrate and isolate these elements from the host-rock matrix. Two separate gradient strong-acid cation-exchange procedures were characterized and the major elements as well as those elements thought to provide the greatest interference for the determination of the REE in geologic materials were tested for separation from the REE. Simultaneous inductively coupled argon plasma-atomic emission spectroscopy (ICAP-AES) measurements were used to construct the chromatograms for the elution studies, allowing the elution patterns of all the elements of interest to be determined in a single fraction of eluent. As a rock matrix, U.S. Geological Survey standard reference BCR-1

In this work, the composition of oxygen-containing yttrium hydride (YHO) thin films was investigated. The films were prepared by reactive sputter deposition, and were found for have oxygen contents on the order of several tens of per cents. We present depth-resolved atomic composition profiles of photochromic YHO films to study the connection between composition, photochromic properties and growth parameters. Two films, deposited at different pressures, were prepared and characterized using ion beam analysis techniques, i.e. Rutherford backscattering spectrometry and elastic recoil detection analysis. We found that an increase of deposition pressure results in larger [O]/[Y] ratios, while the ratio [H]/[Y] becomes reduced. We also report a gradual oxidation of the films exposed to air as well as hydrogen release under ion ...

We propose a two-dimensional (2D) tetragonal material: an yttrium nitride (t-YN) monolayer, with a distinguished combination of mechanical and electronic properties based on first-principles calculations. We find that the t-YN monolayer is a low direct band gap semiconductor (0.55 eV) with strong anisotropic

RATIONALE: Monoclonal antibodies, such as rituximab and yttrium Y 90 ibritumomab tiuxetan, can locate cancer cells and either kill them or deliver radio

RATIONALE: Monoclonal antibodies such as yttrium Y 90 ibritumomab tiuxetan and rituximab can locate cancer cells and either kill them or deliver radioac

In this report, the United States Yttrium Oxide market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022,...

(C5Me5)2Y(η3-C3H5) reacts with 9-borabicyclo[3.3.1]nonane, 9-BBN, to form single crystals containing both a borane-substituted allyl complex, (C5Me5)2Y[η3-C3H4(BC8H14)], and a borohydride, (C5Me5)2Y(μ-H)2BC8H14, that can be synthesized directly from 9-BBN and the yttrium hydride, [(C5Me5)2YH]x.

Oxygen-containing yttrium hydride thin films exhibit photochromic behavior: Transparent thin films reversibly switch from a transparent state to a photodarkened state after being illuminated with UV or blue light. From optical spectrophotometry and ellipsometry measurements of the transparent state and photodarkened state, it is concluded that the photochromic effect can be explained by the gradual growth, under illumination, of metallic domains within the initial wide-band-gap semiconducting lattice. This conclusion is supported by Raman measurements.. ...

We report on a study of the fabrication of submicron silicide structures with a resistless lithography technique. Several different metals can be used as a basis for producing silicide using this method; in this work, results will be discussed for both platinum and nickel silicide. The feasibility of producing nanostructures using polycrystalline silicon as a base growth layer for metal-oxide- semiconductor, and other device applications have also been demonstrated. Threshold doses for this method for submicron lines (,50 nm) and square areas were obtained in order to establish a framework for the fabrication of more complex devices. Preliminary electrical measurements were carried out which indicate that the resistivity of the silicide is 45 [mu omega] cm, and that the barrier height of the silicide/(high resistivity silicon) interface is 0.56 eV ...

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This thesis focuses on the reactivity of polyoxometalate (POM) building blocks; more specifically, those derived from the Keggin {M12} and Wells-Dawson {M18} structural motifs. Lacunary Keggin and Wells-Dawson cages, i.e. those containing metal-atom site vacancies, are highly reactive and versatile fragments that can be employed as structural building units (SBUs) towards the design of novel high nuclearity compounds as well as the assembly of infinite supramolecular framework materials. The isolation of a selection of intermediate species from simple one-pot procedures has been made possible though the use of the water soluble tertiary amine N,N-bis(2-hydroxyethyl)piperazine (bhep) as a pH buffer. These intermediate Keggin-based POM fragments represent monomeric units of previously-reported transition metal-substituted polyoxometalate (TMSP) motifs. This multifunctional amine can be used either as a pH buffer or as a protonated counter cation and consequently plays a key role in the ...

1. Kelly JR, Benetti P. Ceramic materials in dentistry: historical evolution and current practice. Aust Dent J. 2011;56 Suppl 1:84-96.. 2. Li RW, Chow TW, Matinlinna JP. Ceramic dental biomaterials and CAD/CAM technology: state of the art. J Prosthodont Res. 2014;58(4):208-216.. 3. Kelly JR. Dental ceramics: what is this stuff anyway? J Am Dent Assoc. 2008;139 Suppl:4S-7S.. 4. Kelly JR. Dental ceramics: current thinking and trends. Dent Clin North Am. 2004;48(2):513-530.. 5. Denry IL. Recent advances in ceramics for dentistry. Crit Rev Oral Biol Med. 1996;7(2):134-143.. 6. Miyazaki T, Nakamura T, Matsumura H, Ban S, Kobayashi T. Current status of zirconia restoration. J Prosthodont Res. 2013;57(4):236-261.. 7. Magne P, Schlichting LH, Maia HP, Baratieri LN. In vitro fatigue resistance of CAD/CAM composite resin and ceramic posterior occlusal veneers. J Prosthet Dent. 2010;104(3):149-157.. 8. Beier US, Dumfahrt H. Longevity of silicate ceramic restorations. Quintessence Int. ...

The realization of plasmo-electronic integrated circuits in a silicon chip will be enabled by two new plasmonic materials that are proposed and modeled in this article. The first is ion-implanted Si (n-type or p-type) at the surface of an intrinsic Si chip. The second is a thin-layer silicide such as Pd2Si, NiSi, PtSi2 WSi2 or CoSi2 formed at the Si chip surface. For doping concentrations of 1020 cm-3 and 1021 cm-3, our dispersion calculations show that bound surface plasmon polaritons will propagate with low loss on stripe-shaped plasmonic waveguides over the 10 to 55 µm and 2.8 to 15 µm wavelength ranges, respectively. For Pd2Si/Si plasmonic waveguides, the wavelength range of 0.5 to 7.5 µm is useful and here the propagation lengths are 1 to 2300 µm. For both doped and silicided guides, the SPP mode field extends much more into the air above the stripe than it does into the conductive stripe material.. ©2008 Optical Society of America. Full Article , PDF Article ...

This page contains information on the chemical Calcium silicide including: 2 synonyms/identifiers; U.S. Code of Federal Regulations Title 49 Section 172 shipping regulations and 2 proper shipping names; USDOT 2008 Emergency Response Guidebook initial response information.

Weve been promised portable fuel cells for years, but tech from SiGNa Chemistry might have a real shot at taking the concept mainstream. Instead of the more commonly used methanol, the outfit serves up a sodium silicide mix which its begun licensing to companies bearing the SiGNa fueled logo. One example is PowerTrekk that first went on sale in Europe last December and is now making its way to the US this spring. The special salt concoction comes packaged into 5Wh hockey puck cartridges -- appropriately called Pukks -- to generate power and subsequently juice whatever device you plug into it over USB. Itll ship stateside in May for around $200, replete with an onboard 5Wh lithium-ion battery which acts as a rechargeable buffer, ensuring youll still have some juice even after you run out of cartridges. Catch the power generating tech in a video after the break.

Sintered yttria and sintered dysprosia can be used to make single- component thermistors having typical thermistor geometries and operable in the temperature range 500 deg. to 1,200 deg. C. However, at these temperatures, instability of platinum electrodes can contribute a slight aging effect if the thermistor is kept near 1,200 deg. C for long periods. Typical characteristics at 500 deg. C for a

Swedish University dissertations (essays) about YTTRIA. Search and download thousands of Swedish university dissertations. Full text. Free.

Owing to its high stability in aqueous solution and high quantum efficiency, tantalum based oxyntride (TaON) has attracted increasing attentions for application as visible light photocatalyst. However, despite the recent progress in photocatalytic studies, its bulk charge transport mechanisms are yet to be discovered because of the lack of single crystal sample. In this paper, high quality single crystalline TaON(100) thin film was prepared on cubic YSZ(100) surface by reactive RF magnetron sputtering to avail the understandings of charge transport mechanism so as to improve the device efficiency. The stoichiometry, crystal phase and structure were examined in situ by x-ray photoelectron spectroscopy (XPS) and ex situ by x-ray diffraction (XRD) and transmission electron microscopy (TEM). The TaON film crystallizes in monoclinic β-phase with its [010]/[001] directions aligned to those of the substrate. The small band gap of 2.5 eV as well as the high structure perfection suggests better ...

Lava CAD/CAM, created by 3M ESPE, is a system that works with zirconia restorations. This system is offered to both the dentist and the dental laboratory. Lava consists of a chairside oral scanner, a Lava Scan ST scanner which is used by the laboratory, digital software, and a milling machine ...

In 1787, Swedish part-time chemist Carl Axel Arrhenius found a heavy black rock near the Swedish village of Ytterby, Sweden (part of the Stockholm Archipelago).[1] Thinking that it was an unknown mineral containing the newly discovered element tungsten,[2] he named it ytterbite.[note 1] Finnish scientist Johan Gadolin identified a new oxide or earth in Arrhenius sample in 1789, and published his completed analysis in 1794;[3] in 1797, the new oxide was named yttria.[4] In the decades after French scientist Antoine Lavoisier developed the first modern definition of chemical elements, it was believed that earths could be reduced to their elements, meaning that the discovery of a new earth was equivalent to the discovery of the element within, which in this case would have been yttrium.[note 2] Until the early 1920s, the chemical symbol Yt was used for the element, after which Y came into common use.[5] Yttrium metal was first isolated in 1828 when Friedrich Wöhler heated anhydrous ...

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Multiple ferromagnetic secondary phases in Fe implanted yttria stabilized zirconia. A. Shalimov, S. Q. Zhou, O. Roshchupkina, N. Jeutter, C. Baehtz, G. Talut, H. Reuther, K. Potzger. J. Appl. Phys. 108, 024907 (2010).. Fe nanoparticles embedded in MgO crystals. A. Shalimov, K. Potzger, D. Geiger, H. Lichte, G. Talut, A. Misiuk, H. Reuther, F. Stromberg, S. Q. Zhou, C. Baehtz, J. Fassbender. J. Appl. Phys. 105, 064906 (2009).. Memory effect of magnetic nanoparticle systems originating from particle size distribution. G. Zhang, K. Potzger, S. Q. Zhou, A. Muecklich, Y. C. Ma, and J. Fassbender. Nucl. Instrum. Meth. B 267, 1596 (2009).. Formation of metallic clusters in oxide insulators by means of ion beam mixing. G. Talut, K. Potzger, A. Muecklich, and Shengqiang Zhou. J. Appl. Phys. 103, 07D505 (2008).. Ion beam synthesis of Fe nanoparticles in MgO and yttria-stabilized zirconia. K. Potzger, H. Reuther, S. Q. Zhou, A. Mucklich, R. Grotzschel, F. Eichhorn, M. O. Liedke, J. Fassbender, H. Lichte, ...

L.S. Toth. What did we learn about the deformation behavior of polycrystals by texture modelling, during the last 30 years?. Thermec2018 International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications, Jul 2018, Paris, France. ⟨hal-03180687⟩ ...

Abstract: Silicide growth via reaction between a metallic film and a Si substrate has been well documented. In general, atomic transport kinetic during the growth of silicides is considered to be the same as during equilibrium diffusion, despite the reaction and its possible injection of point-defects in the two phases on each side of the interface. To date, the main studies aiming to investigate atomic transport during silicide growth used immobile markers in order to determine which element diffuses the fastest during growth and in which proportion. The quantitative measurements of effective diffusion coefficients during growth was also performed using Deal-and-Groove-type of models, however, these effective coefficients are in general not in agreement with the interdiffusion coefficients calculated using the equilibrium diffusion coefficients measured during diffusion experiments. In general, atomic transport kinetic measurements during growth and without growth are performed using different ...

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TY - JOUR. T1 - Use of a modified zirconia support in the separation of immunoproteins. AU - Subramanian, Anuradha. AU - Sarkar, Sabyasachi. PY - 2002/1/25. Y1 - 2002/1/25. N2 - Zirconia beads (25-38 μm in diameter) were modified with N,N,N′,N′-ethylenediaminetetramethylenephosphonic acid to generate a zirconia based pseudoaffinity support, further referred to as r_PEZ. The influence of pH, salt concentration and temperature on the binding of human immunoglobulin G (hIgG) to r_PEZ was studied. Temperature had no significant impact on the maximum binding capacity (Qmax), and the equilibrium-binding constant (Kd), whereas pH and the salt concentration had a noticeable impact on both Qmax and Kd. The Qmax value of 55 mg hIgG/ml of bead was obtained at a pH of 5.5 and found to decrease with an increase of pH. The modified zirconia support allowed the separation of immunoglobulins (IgG, IgA and IgM) from untreated human serum. Elution was possible under mild conditions with a step salt gradient. ...

USA patent No. 3897358; V. S. Glazachev, E. S. Lukin, et al., Tr. D. I. Mendeleev Inst. Chem. Technol., Moscow, No. 92, 61 (1976).Google Scholar ...

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Abstract: The effect of ion implantation of yttrium on the oxidation behavior of Ni3Al base alloy IC6 at 1100°C was investigated by SEM/EDS, TEM and XRD methods. The results indicated that after Y ion implantation, the surface of IC6 alloy changed from large column crystals to fine distributed nano-crystals, and the density of dislocations in distorted region increased with the implanted ions dose, which can act as high-diffusivity path and oxide core. Comparing to un-implanted IC6 alloy, Y-implantation increased the oxidation rate of IC6 alloy in initial 25 h at 1100°C, but decreased the maximum weight gain and the oxidation rate in final period. Moreover, the oxide scales of Y-implanted IC6 alloy were more continuous and compact due to the benefit effect of yttrium, and had better coherence to substrate through reduction of oxide grain size resulting in oxide scale plasticity improvement. Hence the proper amount of implanted Y could improve the oxidation resistance of IC6 alloy at 1100°C in ...

Unlike conventional dental ceramic powder made by grinding, dental ceramic nanocrystals are formed by vaporization into individual particles. Tetragonal zirconia particles thus formed are not broken

With 8 main frame tube section choices and various specialty tubes, almost anything is possible (see Specifications below). We encourage frame designers to collaborate with us in selecting a specific tube combination for each frame. Rider weight, rider power, tube lengths, fatigue life and ride characteristics all effect tube diameter and wall thickness choices. Each tube option is designed and measured for both its yield strength and sectional stiffness. When combined with performance matching data from ranging rider profiles, you can now not only achieve the perfect rider dimensional fit, you can also design the strength, durability and feel of the ride. See calculation of an Effective Frame Load and corresponding recommendations for main tube selections. ...