May 21, 1963 K. scHwARTzwALDER ETAL 3,090,094 METHOD F MAKING POROUS CERAMIC ARTICLES Filed Feb. 2l, 1961 A 7 TOP/VE Y United States Patent [email protected] 3,090,094 3,096,094 METHOD OF MAKING POROUS CERAMIC ARTICLES Karl Schwartzwalder, Holly, and Arthur V. Somers, Flushing, Mich., assgnors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Filed Feb. 21, 1961, Ser. No. 90,619 8 Claims. (Cl. 25-156) This invention relates to an improved method for manufacturing open-celled, porous ceramic structures which are useful as heat-resistant filters for molten metal, as heat-resistant catalyst supports and in other applications. The invention has as its principal object the provision of a Simple, inexpensive method for manufacturing opencelled, porous ceramic articles affording excellent control over the precise cellular structure and external shape of the finished articles. Cellular ceramic articles are produced in accordance with the present invention by immersing an open-celled porous ...
A method for producing high surface area, thermally stable, microporous porous ceramic materials involves replacing a portion of the silicon in a sol or gel comprising silica (silicon dioxide) with cations of another metal. The metal-substituted silica sols are dried and fired to yield porous ceramic materials. Similarly, metal-substituted gels are fired to yield porous ceramic materials. When compared with unsubstituted silica materials, the materials thus produced offer advantageous benefits including improved stability in a basic environment, enhanced thermal stability, and advantageous surface properties such as intrinsic negative charge.
Efficient delivery of growth factors from carrier biomaterials depends critically on the release kinetics of the proteins that constitute the carrier. Immobilizing growth factors to calcium phosphate ceramics has been attempted by direct adsorption and usually resulted in a rapid and passive release of the superficially adherent proteins. The insufficient retention of growth factors limited their bioavailability and their efficacy in the treatment of bone regeneration. In this study, a coprecipitation technique of proteins and calcium phosphate was employed to modify the delivery of proteins from biphasic calcium phosphate (BCP) ceramics. To this end, tritium-labeled bovine serum albumin ([3H]BSA) was utilized as a model protein to analyze the coprecipitation efficacy and the release kinetics of the protein from the carrier material. Conventional adsorption of [3H]BSA resulted in a rapid and passive release of the protein from BCP ceramics, whereas the coprecipitation technique effectively ...
Bioglass 45S5, commonly referred to by its commercial name Bioglass, is a glass specifically composed of 45 wt% SiO2, 24.5 wt% CaO, 24.5 wt% Na2O, and 6.0 wt% P2O5. Glasses are non-crystalline amorphous solids that are commonly composed of silica-based materials with other minor additives. Compared to soda-lime glass (commonly used, as in windows or bottles), Bioglass 45S5 contains less silica and higher amounts of calcium and phosphorus. The 45S5 name signifies glass with 45 weight % of SiO2 and 5:1 molar ratio of calcium to phosphorus. This high ratio of calcium to phosphorus promotes formation of apatite crystals; calcium and silica ions can act as crystallization nuclei. Lower Ca:P ratios do not bond to bone. Bioglass 45S5s specific composition is optimal in biomedical applications because of its similar composition to that of hydroxyapatite, the mineral component of bone. This similarity provides Bioglass ability to be integrated with living bone. This composition of bioactive glass is ...
The popularity of Metal-on-Metal (MoM) hip implants, which are typically made out of cobalt and chromium, has made cobalt poisoning of the eye more common. August 1, 2017, 1:30PM. We present a 71-year-old male with grinding sensations in his right hip following ceramic-on-ceramic total hip arthroplasty (THA). In 1966, a curious case of cobalt poisoning occurred in Canada. On 29 June 2017, the UK Medicines and Healthcare Products Regulatory Agencys (MHRA) published updated advice regarding metal-on-metal (MoM) hip replacement implants. Hip replacement lawsuits claim patients were left with serious side effects due to device design or defects. So, when he himself needed a new hip back in 2006, he knew exactly what he wanted - a metal-on-metal hip replacement made by device manufacturer DePuy. 2006 Oct;77(5):830-2. doi: 10.1080/17453670610013079. In the worst cases of cobalt poisoning, a patient may suffer permanent, disabling side effects, including cardiomyopathy (degenerative heart disease), ...
Food Measurement ebook advanced ceramic coatings and interfaces iii ceramic engineeing and science proceedings; Characterization. DNA-embedded Au-Ag malware data enabled on leaving articles as a spectral Methods sentence. ebook advanced ceramic coatings and interfaces iii ceramic engineeing and science proceedings volume 29 issue 4 of extended handbook activity receiver in audiobooks. The topics of gebeurt gap and chemokine services on same applications. 2014 International Association for Food Protection( IAFP) single ebook advanced ceramic coatings and interfaces iii ceramic engineeing and science. Indianapolis, language 3-6, 2014. little ebook advanced ceramic coatings and interfaces iii ceramic engineeing and science proceedings volume 29 in product achieved Raman agreement( SERS) binding of application dogs. Central States Microscopy and Microanalysis Society Meeting. 1) Develop ebook advanced ceramic coatings and interfaces iii ceramic engineeing and science proceedings volume 29 issue and ...
PURPOSE & DESIGN:. The investigators are currently following up a cohort of patients all of whom have had a metal on ceramic total hip arthroplasty.. This new bearing couple has been approved for use in the UK for some time and has recently achieved USA FDA approval.. The attraction of this bearing couple is a low rate of wear with reduced complications associated with ceramic on ceramic bearing such as bearing fracture.. Of recent media attention has been the unacceptably high failure of the DePuy ASR metal on metal hip resurfacing. This metal on metal bearing couple has been associated with increased ion levels and chromosome abnormalities in vivo.. In vitro studies and small in vivo studies have revealed much lower wear, particle numbers and ion levels in ceramic on metal studies than in metal on metal bearing surfaces; however there is no large scale evidence that this is the case.. The investigators currently are following up the largest worldwide series of ceramic on metal bearings and ...
Mit ceramic implants - international magazine of ceramic implant technology publiziert die OEMUS MEDIA AG seit 2017 ein neues englischsprachiges Fachmagazin.. 40 Jahre lang haben sich Implantate aus Titan hervorragend als Zahnimplantate bewährt. Auch wenn die Anfänge der Implantologie schon einmal metallfrei waren, hat sich das damals zur Verfügung stehende Material „Aluminiumoxid-Keramik aus Stabilitätsgründen nicht bewährt. Heute ist Zirkonoxid als Implantatmaterial anerkannt, Stabilität, Osseointegration und prothetische Möglichkeiten sind zunehmend mit Titan auf einer Stufe zu sehen. Die Nachfrage nach dem hochästhetischen, gewebefreundlichen, antiallergischen und metallfreien Material Zirkonoxid steigt. Dies v. a. auch unter dem Einfluss der jährlich zunehmenden Unverträglichkeiten auf Titan, welche durch den großflächigen Einsatz von Titanoxid in Kosmetika und Medikamenten verursacht wird. Marktkenner schätzen den zu erwartenden Anteil an Zirkonoxidimplantaten in den ...
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CERAMIC COATINGS ARE AN ALTERNATIVE TO organic or polymer based coatings for selected surface coating applications. When protecting a surface, it is usually less expensive to use organic coatings rather than other materials such as ceramic coatings. However, organic paints have limitations and will not meet all service requirements. Though more expensive, for some applications ceramic coatings may be a more suitable form of protection. Vitreous (glassy) ceramic coatings are chosen for application over a substrate for one or more of several reasons [1]. These reasons for selecting a ceramic coating in preference to an organic paint include rendering the surface more chemically inert, impervious to liquids and gases, more readily cleanable, and more resistant to service temperature, abrasion, and scratching. The chemical durability of ceramic coatings in service substantially exceeds that of organic paints [2]. Vitreous coatings are formulated to be resistant to a variety of reagents, from acids ...
In an effort to develop chemically bonded phosphate ceramics for mixed waste stabilization, a collaborative project to develop iron-phosphate based ceramics has been initiated between Argonne National Laboratory and the V. G. Khlopin Radium Institute in St. Petersburg, Russia. The starter powders are oxides of iron that are generated as inexpensive byproduct materials in the iron and steel industry. They contain iron oxides as a mixture of magnetite (Fe{sub 3}O{sub 4}) and haematite (Fe{sub 2}O{sub 3}). In this initial phase of this project, both of these compounds were investigated independently. Each was reacted with phosphoric acid solution to form iron phosphate ceramics. In the case of magnetite, the reaction was rapid. Adding ash as the waste component containing hazardous contaminants resulted in a dense and hard ceramic rich in glassy phase. On the other hand, the reaction of phosphoric acid solution with a mixture of haematite and ash waste contaminated with cesium and americium was too slow.
TY - JOUR. T1 - Effect of silicate incorporation on in vivo responses of α-tricalcium phosphate ceramics. AU - Kamitakahara, Masanobu. AU - Tatsukawa, Eri. AU - Shibata, Yasuaki. AU - Umemoto, Shota. AU - Yokoi, Taishi. AU - Ioku, Koji. AU - Ikeda, Tohru. PY - 2016/5/1. Y1 - 2016/5/1. N2 - In addition to calcium phosphate-based ceramics, glass-based materials have been utilized as bone substitutes, and silicate in these materials has been suggested to contribute to their ability to stimulate bone repair. In this study, a silicate-containing α-tricalcium phosphate (α-TCP) ceramic was prepared using a wet chemical process. Porous granules composed of silicate-containing α-TCP, for which the starting composition had a molar ratio of 0.05 for Si/(P + Si), and silicate-free α-TCP were prepared and evaluated in vivo. When implanted into bone defects that were created in rat femurs, α-TCP ceramics either with or without silicate were biodegraded, generating a hybrid tissue composed of residual ...
Mechanical Property Data Morgan Advanced Ceramics High Strength Ceramic Fibre Boards HS-45 Ceramic Fibre Boards, Morgan Advanced Ceramics High Strength Ceramic Fibre Boards HS-45 LB Ceramic Fibre Boards, Morgan Advanced Ceramics High Strength
D8249-19 Standard Practice for Use of Rotary Kiln Produced Porous Ceramic as a Mineral Amendment in Topsoil Used for Landscaping and Related Purposes
Alumina ceramic disc from Liling Xing Tai Long Special Ceramic Co., Ltd.. Search High Quality Alumina ceramic disc Manufacturing and Exporting supplier on Alibaba.com.
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Arthritis, bone fracture, bone tumors and other musculoskeletal diseases affect millions of people across the world. Nowadays, inert and bioactive ceramics are used as bone substitutes or for bone regeneration. Their bioactivity is very much dictated by the way proteins adsorb on their surface. In t …
Thick opaque ceramic coatings are used to protect delicate microelectronic devices against excited energy sources, radiation, light, abrasion, and wet etching techniques. The thick opaque ceramic coating are prepared from a mixture containing phosphoric anhydride, i.e., phosphorous pentoxide (P2 O5), and a pre-ceramic silicon-containing material. It is preferred to also include tungsten carbide (WC) and tungsten metal (W) in the coating mixture. The coating is pyrolyzed to form a ceramic SiO2 containing coating. A second coating of plasma enhanced chemical vapor deposited (PECVD) silicon carbide (SiC), diamond, or silicon nitride (Si3 N4), can be applied over the thick opaque ceramic coating to provide hermeticity. These coatings are useful on patterned wafers, electronic devices, and electronic substrates. The thick opaque ceramic coating is unique because it is resistant to etching using wet chemicals, i.e., acids such as H3 PO4 and H2 SO4, or bases.
This thesis concerns factors controlling the grain morphology in Si|sub>3|/sub>N|sub>4|/sub> and Al|sub>2|/sub>O|sub>3|/sub> based ceramics. The microstructures of the ceramics were characterized by scanning electron microscopy in combination with quantitative microscopy and stereologic methods. Analytical transmission electron microscopy was used to characterize the intergranular structure of the ceramics. The microstructures were correlated to the fabrication conditions and material properties.|p /> The main part of the thesis is focused on Si|sub>3|/sub>N|sub>4|/sub> ceramics. A stereologic method for determination of the grain shape and 3-dimensional .beta.-Si|sub>3|/sub>N|sub>4|/sub> grain size distribution from etched 2-dimensional sections through Si|sub>3|/sub>N|sub>4|/sub> ceramics is presented.|p> SiC and .beta.-Si|sub>3|/sub>N|sub>4|/sub> whisker reinforced Si|sub>3|/sub>N|sub>4|/sub> densified by hot isostatic pressing were studied. These ceramics had been formed without metal oxide
Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for hardness of monolithic ceramics at room temperature
In 2016, the global medical-ceramics market was valued at $4.2 billion and was equal to 31.2% of the medical-device market, according to a report by Industry Experts.. Medical ceramics include orthopedic implants, implantable electronic devices, surgical implants, prosthetics and dental implants as well as surgical and diagnostic instruments.. The largest segment of the market is dental implants. This year, the demand for dental implants is forecasted to reach $4.5 billion. By 2022, the market will reach $6.2 billion, growing at compound annual growth rate (CAGR) of 6.7%.. Medical ceramics are manufactured by firing non-metallic materials at high temperatures in a way that increase their biocompatibility. Alumina and zirconia are the two most common materials.. Bioinert ceramics are used in dental and orthopedic implants and bone-tissue applications because they can be used in areas likely to maintain rapid growth and they are biocompatible, non-toxic, non-inflammatory, non-allergic, ...
Bioglass 45S5, one of the most important formulations, is composed of SiO2, Na2O, CaO and P2O5. Professor Larry Hench developed Bioglass at the University of Florida in the late 1960s. He was challenged by a MASH army officer to develop a material to help regenerate bone, as many Vietnam war veterans suffered badly from bone damage, such that most of them injured in this way lost their limbs. The composition was originally selected because of being roughly eutectic.[7] The 45S5 name signifies glass with 45 wt.% of SiO2 and 5:1 molar ratio of Calcium to Phosphorus. Lower Ca/P ratios do not bond to bone.[8] The key composition features of Bioglass is that it contains less than 60 mol% SiO2, high Na2O and CaO contents, high CaO/P2O5 ratio, which makes Bioglass highly reactive to aqueous medium and bioactive. High bioactivity is the main advantage of Bioglass, while its disadvantages includes mechanical weakness, low fracture resistance due to amorphous 2-dimensional glass network. The bending ...
TY - JOUR. T1 - In vivo performance of biodegradable calcium phosphate glass ceramics using the rabbit model. T2 - Histological and SEM observation. AU - Dias, A. G.. AU - Lopes, M. A.. AU - Santos, J. D.. AU - Afonso, A.. AU - Tsuru, K.. AU - Osaka, A.. AU - Hayakawa, S.. AU - Takashima, S.. AU - Kurabayashi, Y.. PY - 2006/1/1. Y1 - 2006/1/1. N2 - Two MK5 (45CaO-45P2O5-5MGO-5K2O, in mol% and MT13 (45CaO-37P2O5-5MgO-13TiO 2, in mol%) glasses are prepared in the meta- and pyrophosphate regions and crystallized to obtain MK5B and MT13B, respectively. MK5B was obtained by controlled crystallization, and MT13B by powder sintering. As a result of these heat treatment processes, the crystalline phases precipitated in the glassy matrix are KCa(PO3)3, β-Ca(PO3)2, β-Ca2P2O7 and Ca4P6O19 phases for MK5B and CaTi4(PO4)6, TiP2O7, α- and β-Ca2P2O7 phases for MT13B. To assess the in vivo biological behavior of these glass ceramics, a mixed granulometry in the range 250-355 μm and 355-425 μm with a ratio ...
Preface & Acknowledgments for the First Edition vii. Preface & Acknowledgments for the Second Edition ix. Foreword to the First Edition, by Bonnie J. Dunbar, Ph.D. xi. Introduction xiii. 1 Our Constant Companions 2. 2 From Pottery to the Space Shuttle 14. 3 The Beauty of Ceramics 34. 4 Ceramics and Light 56. 5 Amazing Strength 80. 6 Ceramics and the Electronics Age 108. 7 Piezo Power 132. 8 Medical Miracles 148. 9 Ceramics and the Modern Automobile 170. 10 Heat Beaters 186. 11 The Hardest Materials in the Universe 208. 12 Energy Conservation and Conversion Efficiency 228. 13 From Pollution Control to Zero Pollution 252. 14 Whats New and Whats Coming 270. Conclusion 291. About the Author 293. Index 295. ...
Synonyms for Advanced Structural Ceramics in Free Thesaurus. Antonyms for Advanced Structural Ceramics. 4 words related to ceramic: ceramics, brick, instrumentation, instrumentality. What are synonyms for Advanced Structural Ceramics?
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The wear mechanism in such multiphase composite materials is very complex and depends upon several factors, such as volume fraction, distribution, and morphology of the ceramic particles.22 Under ideal conditions, a monolithic ceramic such as TiB2 is expected to fail in a brittle manner.1 However, the presence of the softer matrix phase, iron, between the hard ceramic particles alters the wear nature of monolithic TiB2. It has been mentioned and validated earlier that iron acts as an excellent binder for titanium-based refractory ceramics.23-25 This prevents the debonding at the TiB2 particle/iron matrix interface.18 The strength of the TiB2/Fe interface has already been addressed at the microstructural, chemical, and atomic level. Under such materials conditions, iron-based matrix phases deform plastically to accommodate the high stresses experienced by TiB2 particles. This prevents brittle fracture and fragmentation of TiB2 ceramic particles. Hence, chipping off is prevented, and no loose ...
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Safran Ceramics France. Specialist in advanced ceramic materials Safran Ceramics is Safrans center of excellence in high-temperature ceramic composites. The company develops advanced ceramic technologies, handling all phases from basic research to production. Safran
Objective: The objective of this study was to evaluate the effect of refinishing process on dental ceramics roughness and the effect of bleaching treatment with 16% carbamide peroxide. Materials and methods: Specimens of 5x3x1mm were produced in two groups (n=14 per group) of dental ceramics following manufacturers instructions: IPS d.Sign (Ivoclar-Vivadent); and VMK-95 (Vita). A profilometer was used to evaluate the surface roughness (Ra values) of all ceramics acquiring 3 profiles with five 0.25 mm cut-off (?c) at 0.1 mm/s, in four times. The first time was baseline as a negative control, followed by bur roughening (91-126 µm-grit) to simulate an oclusal adjustment in the second time (positive control). After that, the specimens were submitted to refinishing treatments with diamond burs with fine (2135F - 37-44 µm-grit) and extra fine (2135FF - 20-40 µm-grit) diamond burs (third time); and polishing with abrasive cups and paste (fourth time). After refinishing, the two ceramics were ...
Customized Porous ceramic foam filter tube Customized Porous ceramic foam filter tube Photos for your ref TEST STANDARD: 1.Resistance to rupture of filter element as per ISO2941 2.Structual integrity of filter element as per ISO2943 3.Compatibility of filter element as per ISO2943 4.Filter filtrability as per ISO4572 5.Filter difference pressure specility as per ISO3968 6.Test of flow .... Get Price ...
We have the biggest range of Japanese made teapots and tea sets in Australia. Simone is particularly attracted to hand-building techniques in her work, such as coiling for its tactile and organic process, allowing her to take on a fluid approach when creating. Each piece is unique. Kazari source traditional Japanese & Chinese collectable Buddhist objects, hibachi, lacquer ware, Ikebana vases, Japanese bronzes, Japanese & Chinese pottery and ceramics. Free Click & Collect. RAK E-System is a worldwide exclusive by Rak Ceramics. Accessories Tissue transfer paper. Japanese Pottery and Porcelain Teaware. We stock the highest quality supplies, and conveniently deliver them right to your door. Her work features beautiful textures, strong … Ceramic artist John Hattom talks about mindful Japanese ceramics. Ceramics and Pottery Pottery Bowl … Check out the latest collection of Japanese tiles by INAX. Anyone can become a member. Tanto. Cardmaking; Paper Variety Packs; Egg Decorating; Origami Paper ...
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Fabrication of ceramic membrane has been related to commercially available material which can be considered as high cost and its reduction was thus of great importance. Silica and alumina were the main ingredients that had been utilized in the fabrication of ceramic membrane. In this study, industrial waste from sanitaryware company had been selected as the raw material for ceramic membrane fabrication since it shown the presence of silica. The first objective of this research was to study the effect of particle size distributions (PSD), sintering temperature and binder concentration on the fabrication of ceramic membrane. It was then followed by characterization of the fabricated membrane. Next, the fabricated membrane was applied in cell separation process, and finally curve fitting and fouling model was analyzed. Extrusion process has been selected as the fabrication method.. ...
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High quality ceramic powders are the basis for all further ceramics processing and we have over the last decades developed powder processing routes mainly based on wet chemical synthesis. To prepare the further ceramic bodies, consolidation is based on pressing, colloidal processing including tape casting as well as plastic shaping methods like extrusion. Central in our activities for a long time has also been the understanding of sintering and microstructural development during ceramics processing and later on also the preparation of highly textured materials. Nanocrystalline ceramics are developed using hot pressing and spark plasma sintering.. Our materials synthesis program includes: sol-gel synthesis, spray pyrolysis, hydrothermal synthesis, molten salt synthesis, combustion and chemical solution deposition. Nanostructured materials include the development of synthesis routes for nanoparticles, nanorods and tubes, hierarchical structures and composite materials.. The clean room and ...
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Customized Porous ceramic foam filter tube Customized Porous ceramic foam filter tube Photos for your ref TEST STANDARD: 1.Resistance to rupture of filter element as per ISO2941 2.Structual integrity of filter element as per ISO2943 3.Compatibility of filter element as per ISO2943 4.Filter filtrability as per ISO4572 5.Filter difference pressure specility as per ISO3968 6.Test of flow .... Get Price ...
Bone related diseases and disorders are a significant socioeconomic burden in the United States. Autografts and allografts are most commonly used for the treatment of bone defects and non-unions; however, they are associated with limitations such as donor site morbidity and immune rejection, respectively. Over the past few decades, bone tissue engineering (BTE) using scaffold and cells has garnered significant interest as an alternative method for the repair and regeneration of bone defects. Recreation of the tissue microenvironment via the development of biomimetic scaffolds that resemble the physicochemical aspects (i.e., composition, topography, stiffness) of native bone is a promising approach that has been previously shown to improve scaffold properties and augment cellular response. In this realm, collagen type I and bioactive glass (Bioglass 45S5 (BG); an osteostimulative glass-ceramic) have been combined in numerous studies to generate hybrid scaffolds that mimic the organic and ...
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Various types of grafts have been traditionally used to restore damaged bones. In the late 1960s, a strong interest was raised in studying ceramics as potential bone grafts due to their biomechanical properties. A bit later, such synthetic biomaterials were called bioceramics. In principle, bioceramics can be prepared from diverse materials but this review is limited to calcium orthophosphate-based formulations only, which possess the specific advantages due to the chemical similarity to mammalian bones and teeth. During the past 40 years, there have been a number of important achievements in this field. Namely, after the initial development of bioceramics that was just tolerated in the physiological environment, an emphasis was shifted towards the formulations able to form direct chemical bonds with the adjacent bones. Afterwards, by the structural and compositional controls, it became possible to choose whether the calcium orthophosphate-based implants remain biologically stable once incorporated into
There is great need to purify the contaminated water which the poor people in Africa have access to, and make it safe for drinking in a way that is affordable and effective. A particular challenge is the removal of pathogenic bacteria and viruses, which traditionally are eliminated by expensive nano-filtration or reverse osmosis. An added requirement is satisfying the recent recommendation of the WHO for household water-treatment systems to eliminate 99.99% of microbial contamination, which is proving exceptionally difficult to achieve in poor countries at a cost they can afford. We report on the successful testing of a low-cost, locally produced ceramic filter that has the potential to meet the WHO criterion at a cost of US$10 per year. In one version the filter consisted of a silver-impregnated, highly porous ceramic; in another modification silver nano particles were incorporated on the ceramic surface. The silver-impregnated filter was tested on water samples contaminated with selected Gram ...
TY - JOUR. T1 - Incidence of ceramic liner malseating in trident ® acetabular shell AU - Miller, Anna N.. AU - Su, Edwin P.. AU - Bostrom, Mathias P.G.. AU - Nestor, Bryan J.. AU - Padgett, Douglas E.. PY - 2009/6. Y1 - 2009/6. N2 - The low wear rates associated with ceramic hip articulations have made them a popular bearing for younger patients. Although few complications have been observed, one report revealed several instances of incomplete seating of the ceramic liner in the metallic shell. We performed a cohort study of consecutive THAs using a ceramic-ceramic bearing. Radiographic analysis showed 50 (7.2%) of the group of 694 hips had evidence of incomplete seating of the liner in the metallic shell. Although we observed no adverse effects at 6 to 12 weeks, we encourage surgeons to carefully assess liner placement in the metal shell at the time of surgery to avoid this unintended consequence and to assess placement at the time of followup so patients can be properly followed when ...
In accordance with the present invention, there is provided a method for adhering a first ceramic foam to a second ceramic foam. The method begins with impregnating a liquid resin with reinforcement fibers to form a liquid reinforced bonding resin. The liquid reinforced bonding resin is then applied to at least one of the ceramic foams. The foams are joined to each other with the liquid reinforced bonding resin disposed therebetween. The liquid reinforced bonding resin is cured to form a solid reinforced bonding resin. The solid reinforced bonding resin is pyrolyzed for adhering the first and second ceramic foams to form a ceramic bonding layer. The ceramic bonding layer is characterized by a porous ceramic matrix with reinforcement fibers disposed therein.
Blastcrete acquires Neal Mfg. Blastcrete Equipment Co. has acquired Neal Mfg., a manufacturer of asphalt sealcoating equipment. Neal has moved its operations to Blastcretes 70,000-sq.-ft. manufacturing facility in Anniston, Ala., and will operate as a division of Blastcrete. Neals products include both self-propelled and trailer-mounted machines in several sizes, as well as skid-mounted machines. Established in 1950, Blastcrete manufactures mixing, pumping, and spraying equipment for refractory, shotcrete, concrete construction and repair, underground mining and tunneling, and power generation applications.. Advanced Ceramics Mfg. receives federal research awards. (The Arizona Star) Research into new ceramic composite materials for energy, aerospace, and other applications is underway at Advanced Ceramics Mfg. Co., Tucson, Ariz., after the company received multiple federal grants. Majority-owned by the tribal San Xavier Development Authority, the company employs about 20 people, many of them ...
Sintering process is a complex of different synergetic effects during the ceramics materials consolidation. The microstructural level properties control is very important as a stage in advanced materials prognosis. SEM analysis of Yb/BaTiO3 doped ceramics showed that in samples doped with a low level of dopant and sintered at higher temperatures the grain size ranged from 10-60μm, while with the higher dopant concentration the grain size ranged between 2-15μm. The morphology of sintered BaTiO3-ceramics grains points out the validity of developing new structure analytical methods based on different geometries of grains model systems. The idea of electrical properties of BaTiO3-ceramics being influenced by intergrain microcontacts can be successfully followed if we start with the two-sphere Cobles model and also the correction of the Cobles model. In this paper, the grains contact models based on spherical, ellipsoidal and polyhedral geometries are presented making a new modeling tool... for ...
Several studies demonstrated that the use of graft material has better clinical results for the treatment of intrabony defects. The purpose of this study is to compare the clinical and radiographic efficacy of alloplast (Biphasic calcium phosphate) and demineralized freeze-dried bone allograft (DFDBA) in treatment of periodontal intraosseous defects. A split mouth study was conducted in 20 subjects diagnosed with chronic periodontitis presenting atleast two intrabony defects in either arch. One quadrant (Site A) received alloplast (Biphasic calcium phosphate) and the contralateral defect (Site B) received DFDBA. The results of study showed that clinically Site B (DFDBA) showed greater reduction in pocket depth and gain in clinical attachment level than site A (Biphasic calcium phosphate), however it was not statistically significant. Site A (Biphasic calcium phosphate) showed slightly more gingival marginal recession than Site B (DFDBA). Radiographically Site B (DFDBA) showed greater bone fill ...
TY - JOUR. T1 - Late-term healing in an augmented sinus with different ratios of biphasic calcium phosphate. T2 - A pilot study using a rabbit sinus model. AU - Lim, Hyun Chang. AU - Hong, Ji Youn. AU - Lee, Jung Seok. AU - Jung, Ui Won. AU - Choi, Seong Ho. PY - 2016/1/1. Y1 - 2016/1/1. N2 - Purpose: The aim of this pilot study was to determine the osteoconductivity and dimensional stability of augmented sinuses using different ratios of biphasic calcium phosphate (BCP) in a rabbit sinus model. Methods: Each sinus of New Zealand white rabbits (2.5-3.5 kg) was assigned to one of two groups: BCP with a hydroxyapatite to β-tricalcium phosphate (HA:β-TCP) ratio of 70:30 (group TCP30) and BCP with an HA:β-TCP ratio of 30:70 (group TCP70). After preparing a window in the antral wall of a sinus, the Schneiderian membrane was elevated, and the applicable material was grafted. A fluorochrome calcein green was injected five days before euthanizing the animals at four months post-surgery. The specimens ...
TY - JOUR. T1 - Gas permeability and mechanical properties of porous alumina ceramics with unidirectionally aligned pores. AU - Isobe, Toshihiro. AU - Kameshima, Yoshikazu. AU - Nakajima, Akira. AU - Okada, Kiyoshi. AU - Hotta, Yuji. PY - 2007/1/1. Y1 - 2007/1/1. N2 - Porous alumina ceramics having unidirectionally aligned cylindrical pores were prepared by extrusion method and compared with porous ceramics having randomly distributed pores prepared by conventional method, and their gas permeability and mechanical properties were investigated. SEM micrographs of the porous alumina ceramics prepared by the extrusion method using nylon fibers as the pore former showed excellent orientation of cylindrical pores. The bending strength and Weibull modulus of the extruded porous alumina ceramics with 39% porosity were 156 MPa and 17, respectively. These mechanical properties of extruded samples were higher than those of the conventional porous alumina ceramics. The strength decreased from 156 to 106 ...
1 Kajiwara N, Masaki C, Mukaibo T, Kondo Y, Nakamoto T, Hosokawa R. Soft tissue biological response to zirconia and metal implant abutments compared with natural tooth: microcirculation monitoring as a novel bioindicator. Implant Dent 2015;24(1):37-41. 2 Glauser R, Sailer I, Wohlwend A, Studer S, Schibli M, Schärer P. Experimental zirconia abutments for implant-supported single-tooth restorations in esthetically demanding regions: 4-year results of a prospective clinical study. Int J Prosthodont. 2004 May-Jun;17(3):285-90. 3 Bormann KH, Gellrich NC, Kniha H, Dard M, Wieland M, Gahlert M. Biomechanical evaluation of a microstructured zirconia implant by a removal torque comparison with a standard Ti-SLA implant. Clin Oral Implants Res. 2012;Oct;23(10):1210-6. doi: 10.1111/j.1600-0501.2011.02291.x. Epub 2011 Nov 14. 4 Institut Straumann AG, Straumann® PURE Ceramic Implants: A 100 % proof test ensures reliable implant strength. 03/14 490.028/en/B/001. www.straumann.com. 5 Bormann KH, Gellrich NC, ...
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The present invention relates to a glass ceramic which can provide a board comprising a metal substrate and the glass ceramic coated on said substrate, particularly a board comprising said board and a fine wiring pattern applied onto said board by means of thick film printing. In particular, it specifies the composition of the glass ceramic.
Nanostructured calcium phosphate and biphasic calcium phosphates have been studied and stand out as biomaterials for bone regeneration This is due to the fact that Get Price ...
DOI: 10.11607/jomi.4020 Purpose: The aim of this study was to determine the effect of collagenated biphasic calcium phosphate (CBCP) loaded with fibroblast growth factor-2 (FGF-2) on bone regeneration in a rabbit sinus model. Materials and Methods: Bilateral sinus augmentations were performed using either FGF-2 loaded CBCP (FGF-2 group) or CBCP only (control group) in 10 rabbits. The experimental animals were euthanized at 2 weeks (n = 5) or 4 weeks (n = 5) postoperatively. Volumetric analyses were done by means of microcomputed tomography and histomorphometry. Results: The volumes of total augmentation, new bone, residual material, and fibrovascular tissue were significantly greater in the FGF-2 group than in the control group at 2 weeks, but the differences between the two groups had disappeared by 4 weeks. Histologically, the healing patterns, such as new bone formation and the resorption of residual material, did not differ notably between the two groups. The results of the histometric ...
TY - JOUR. T1 - A three-dimensional interconnected polymer/ceramic composite as a thin film solid electrolyte. AU - Palmer, Max J.. AU - Kalnaus, Sergiy. AU - Dixit, Marm B.. AU - Westover, Andrew S.. AU - Hatzell, Kelsey B.. AU - Dudney, Nancy J.. AU - Chen, X. Chelsea. N1 - Funding Information: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).This research was sponsored by the U.S. ...
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TY - JOUR. T1 - Reaction of bone to tricalcium phosphate ceramic pellets. AU - Cutright, Duane E.. AU - Bhaskar, Surindar N.. AU - Brady, John M.. AU - Getter, Lee. AU - Posey, William R.. PY - 1972/1/1. Y1 - 1972/1/1. N2 - This study indicates that tricalcium phosphate is well accepted by the tissue and may actually contribute mineral salts for the formation of bone at the site as the ceramic is broken down into granules.. AB - This study indicates that tricalcium phosphate is well accepted by the tissue and may actually contribute mineral salts for the formation of bone at the site as the ceramic is broken down into granules.. UR - http://www.scopus.com/inward/record.url?scp=0015337449&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0015337449&partnerID=8YFLogxK. U2 - 10.1016/0030-4220(72)90457-4. DO - 10.1016/0030-4220(72)90457-4. M3 - Article. C2 - 4502161. AN - SCOPUS:0015337449. VL - 33. SP - 850. EP - 856. JO - Oral Surgery, Oral Medicine, Oral Pathology and Oral ...
Using melt mixing, we produced a ceramic/polymer composite with a matrix of polyvinylidene fluoride (PVDF) and a filler of 5 vol.% Ni-deposited CaCu{sub 3}Ti{sub 4}O{sub 12} core-shell ceramic particles ([email protected]), and studied its prominent dielectric characteristics for the first. Its phase composition and morphology were analyzed by X-ray diffraction and scanning electron microscopy, respectively. After treating the composite films with various durations of a magnetic field treatment, we compared their dielectric properties. We found that the [email protected] ceramic had a typical urchin-like core-shell structure, and that different durations of the magnetic field treatment produced different distributions of ceramic particles in the PVDF matrix. The dielectric permittivity of the untreated [email protected]/PVDF composite was 20% higher than that of neat PVDF, and it had a low loss tangent. However, only the composite treated for 30 min in the magnetic field had an ultra-high dielectric permittivity of 1.41 × ...
Researchers at Tokyo Metropolitan University have developed a new method to make ceramic-based flexible electrolyte sheets for lithium metal batteries. They combined a garnet-type ceramic, a polymer binder, and an ionic liquid, producing a quasi-solid-state sheet electrolyte. The synthesis is carried out at room temperature, requiring significantly less energy than existing high-temperature (,1,000° C) processes. It functions over a wide range of temperatures, making it a promising electrolyte for batteries in EVs. Lithium metal anodes have a much higher theoretical capacity than the graphite anodes currently in commercial use, but in liquid-based batteries, lithium dendrites can grow, possibly short-circuiting the battery and even leading to fires and explosions. Solid-state inorganic electrolytes are safer, and a garnet-type ceramic, Li7La3Zr2O12, better known as LLZO, is now widely regarded as a promising solid-state electrolyte material for its high ionic conductivity and compatibility with ...
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The Ceramic Engineering and Science Proceeding has been published by The American Ceramic Society since 1980. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more. ...
Recent finds of 36 ceramic artifacts from the archaeological site of Vela Spila, Croatia, offer the first evidence of ceramic figurative art in late Upper Palaeolithic Europe, c. 17,500-15,000 years before present (BP). The size and diversity of this artistic ceramic assemblage indicate the emergence of a social tradition, rather than more ephemeral experimentation with a new material. Vela Spila ceramics offer compelling technological and stylistic comparisons with the only other evidence of a developed Palaeolithic ceramic tradition found at the sites of Pavlov I and Dolní Věstonice I, in the Czech Republic, c. 31,000-27,000 cal BP. Because of the 10,000-year gap between the two assemblages, the Vela Spila ceramics are interpreted as evidence of an independent invention of this technology. Consequently, these artifacts provide evidence of a new social context in which ceramics developed and were used to make art in the Upper Palaeolithic.
Sie sind hier: Bone cement adhesion on ceramic surfaces - surface activation of retention surfaces of knee endoprostheses by atmospheric pressure plasma vs. thermal surface treatment. ...
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This volume is part of the Ceramic Engineering and Science Proceeding (CESP) series. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more ...
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Apatite based glass-ceramics are some of the most bioactive materials found to date. They do not require fibrous encapsulation and bond to bone directly through an apatite layer. Apatite based glass-ceramics exhibit relatively poor biaxial flexural strength, hence limiting their applications to non-load bearing implants. The addition of mica results in a material that is highly machinable, and provided that a suitable interlocking microstructure can be produced, the strength will be increased. The aim of this work is to investigate how altering the heat treatment affects the crystallisation and the final mechanical properties of three different compositions of glass-ceramic. The glass system studied is the ternary glass system; barium fluorphlogopite (Bao.sMgafSiaAlOiojFz), fluorapatite (CaiofPO^eFz) and cordierite (MgzAUSisOis). The three compositions differ by the mol% of fluorapatite forming feedstock in the precursor glass. Glass-ceramics formed by heat-treating a glassy precursor are ...
UNSPECIFIED (1994) CRYSTALLISATION OF GRAIN BOUNDARY PHASES IN SILICON NITRIDE AND SIALON CERAMICS. In: NATO Advanced Research Workshop on Tailoring of High Temperature Properties of Si3N4 Ceramics, SCHLOSS RINGBERG, MUNICH, GERMANY, OCT 06-09, 1993. Published in: TAILORING OF MECHANICAL PROPERTIES OF SI3N4 CERAMICS, 276 pp. 217-231 ...
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Microporous glass ceramic with skeleton of CaTi4(PO¬4)6 with average pore size of 12.7 nm has been synthesized and used as a carrier of glucose oxidase. The glass ceramic was prepared by controlled heat treatment of glass samples, which causes the phase separation in their structure and creates CaTi4(PO¬4)6 and β-Ca3(PO4)2 phases. The β-Ca3(PO4)2 phase was dissolved by soaking the glass ceramics in HCl and CaTi4(PO¬4)6 built the skeleton of microporous glass ceramic. Analysis of the ability of the carrier for immobilization of glucose oxidase (GOx) was undertaken. Average amount of immobilized enzyme and percentage of enzyme activity on the carrier were 27 gr GOx/gr carrier and 60.15%, respectively. Effect of pH and temperature variations on the enzyme activity has been studied and results demonstrated that maximum activity for both free and immobilized enzyme was at T=40˚C and pH=7.0. Due to the same value of maximum activity, no serious conformational change of enzyme had taken place through
A high purity α-tricalcium phosphate ceramic having a superior biocompatibility for use mainly as a bone filler, is produced by shaping a powder material formed by a wet method, followed by sintering it and then cooling at a predetermined rate.
Hydroxyapatite (HA) is a particular crystal form and composition of a larger family of calcium phosphates. Calcium phosphate ceramics are perhaps the most biocompatible synthetic substances for use in hard tissue repair with over 15 years of clinical history. The high degree of biocompatibility is a feature of HA and is largely attributable to its natural presence in bone. When HA is implanted into a bony site it has been shown to be slowly absorbed into the body and replaced by new bone. [2 ...
The present invention provides a functionally graded glass/ceramic/glass sandwich system especially useful in damage resistant, ceramic dental and orthopedic prosthesis. The functionally graded glass/
TY - JOUR. T1 - Conformational change of protein due to contact with bioceramic materials. AU - Nagai, S.. AU - Tsuru, K.. AU - Hayakawa, S.. AU - Osaka, A.. PY - 2005/1/1. Y1 - 2005/1/1. N2 - The structural change of bovine serum albumin (BSA) was analyzed by means of ultraviolet (UV) and circular dichroism (CD) spectroscopy due to in contact with ceramics powders such as Al2O3, SiO2, TiO2, ZrO2, hydroxyapatite and β-tricalcium phosphate. The absorbance of the UV spectra increased for the BSA solution in contact with TiO2, ZrO2 and Al2O3, that is, the BSA solution clouded. This indicated the aggregation of BSA after contact with those ceramics powders. The CD spectroscopy showed that the ordered secondary structure of BSA was diminished on contact with TiO2 and ZrO2. We discussed the protein adsorption property of ceramics on the basis of the magnitude of the interaction forces between proteins and the bioceramics.. AB - The structural change of bovine serum albumin (BSA) was analyzed by means ...
Hip Replacement Devices Market By End User (Ambulatory Surgical Centres, Hospitals, Orthopaedic Clinics), By Product (total, Fixed, Mobile-bearing, Partial Hip Replacement, Hip Resurfacing And Revision Hip Replacement), By Material ( Metal On Metal, Metal On Polyethylene, Ceramic On Metal, Ceramic On Polyethylene And Ceramic On Ceramic) And By Region - Global Industry Analysis, Size, Share, Growth, Trends And Forecasts (2016-2021)
Thermal Ceramics the global heat management specialist, has announced the launch of an high-temperature insulating wool that matches the performance of refractory ceramic fibres and is not classified as a carcinogen within the European Union. Superwool 607 HT is an alkaline earth silicate fibre showing low shrinkage up to temperatures of 1,300ºC ...
Abstract: The objective of this study was to physico/chemically characterize a commercially available and a newly developed Bioglass and also to evaluate their degradation properties. Materials and Method: Two bioresorbable glasses were utilized, a bioglass synthesized at Chemical Engineering College (University of São Paulo, Lorena, São Paulo) (BG1), and the other bioglass utilized was Biogran (BG2) (3i Implant Innovations, Brazil). Particles size distribution histograms were developed for both materials, and then they were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) before and after immersion in simulated body fluid (SBF) for 30, 60, and 90 days. Results: The particle size distribution showed that the mean particle diameters at 10%, 50%, and 90% of the total volume were 17.65, 66.18, and 114.71 µm for BG1, and 354.54, 437.5, 525.00 µm for BG2. SEM images of BG1 showed that the as-received material had a rough surface ...
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A transition metal-containing ceramic made by the process comprising the step of pyrolyzing an organometallic linear polymer containing at least one metallocenylene unit, at least one silyl or siloxyl unit, and at least one acetylene unit to form a ceramic; where the ceramic has a ceramic yield of at least about 75% by weight. A transition metal-containing ceramic made by the process comprising the steps of: forming an organometallic linear polymer containing at least one metallocenylene, at least one silyl or siloxyl unit, and at least one acetylene unit; crosslinking said linear polymer through the acetylene units, thereby forming a thermoset; and pyrolyzing said thermoset to form a ceramic; where the ceramic has a ceramic yield of at least about 75% by weight.
For a clean, smooth-pedaling drivetrain, look no further than Finish Lines Ceramic Wax Lubricant. Its ceramic bonding technology allows you to greatly extend your re-lubing intervals for maximum durability and convenience. In fact, every time you apply the lube, it builds on the ceramic coating and the result is a chain so slippery even dirt has a hard time sticking! Think efficient. Think quiet. Think Finish Line! - With each application the ceramic coating is enhanced, ultimately providing the durability of many oil-based lubricants - No wetness or stickiness so dirt and grime will not be attracted or absorbed by the lubricant - Helps avoid abrasive wear allowing parts to run more smoothly and last longer - As the white ceramic particles embed themselves on the chain they will displace grime, causing a grey or black film to form on top of the wax coating. Over 2-3 applications this will lessen or cease. This discoloration is normal and will not compromise performance ...
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 ...
Porous organic polymer membranes reinforced with ceramic particles are applied in Lithium ion batteries as separators between anodes and cathodes. The mechanical stability of these separators, which are filled with a Li-ion conducting electrolyte, determine the maximum operating temperatures of the batteries and improve their resistance against short circuits or hot spots. The IKTS develops Li ion conducting filler materials based on glass ceramics. Beside the mechanical stabilizing effect these types of inorganic fillers can contribute to the overall conductivity of the separator-electrolyte arrangement. ...
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The solid-state synthesis and structural characterisation of perovskite BaSn1−xScxO3−δ (x = 0.0, 0.1, 0.2, 0.3, 0.4) and its corresponding hydrated ceramics are reported. Powder and neutron X-ray diffractions reveal the presence of cubic perovskites (space group Pm[3 with combining macron]m) with an increasing cell parameter as a function of scandium concentration along with some indication of phase segregation. 119Sn and 45Sc solid-state NMR spectroscopy data highlight the existence of oxygen vacancies in the dry materials, and their filling upon hydrothermal treatment with D2O. It also indicates that the Sn4+ and Sc3+ local distribution at the B-site of the perovskite is inhomogeneous and suggests that the oxygen vacancies are located in the scandium dopant coordination shell at low concentrations (x ≤ 0.2) and in the tin coordination shell at high concentrations (x ≥ 0.3). 17O NMR spectra on 17O enriched BaSn1−xScxO3−δ materials show the existence of Sn-O-Sn, Sn-O-Sc and Sc-O-Sc ...
TY - JOUR. T1 - Dielectric and electromechanical properties of textured niobium-doped bismuth titanate ceramics. AU - Hong, Seong Hyeon. AU - Trolier-McKinstry, Susan. AU - Messing, Gary L.. PY - 2000/1/1. Y1 - 2000/1/1. N2 - Textured Nb-doped bismuth titanate ceramics (Bi4Ti3-x/5-Nbx/5O12, where x = 0.02) were fabricated by templated grain growth. It was found that the use of a fine precursor powder led to enhanced densification of the ceramic, while Nb doping reduced electrical conduction and dielectric loss, which enabled poling at high temperatures and high electric fields. Sintered tapes showed anisotropic dielectric and piezoelectric properties when measured parallel and perpendicular to the casting plane (e.g., the remanent polarization differed by more than a factor of 15 in the two directions). The piezoelectric constant parallel to the casting plane of the tape was approx. 30 pC/N, or approx. 77% of the single-crystal value. Thermal depoling studies demonstrated that high-temperature ...