Results 221 to 230 of about 29,267 (265)
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Nature of hydrous zirconia and sulfated hydrous zirconia
Catalysis Today, 1994Abstract The structure of crystalline hydrous zirconias and their methods of formation are described. A mechanism for the hydrolytic polymerization of Zr IV to obtain the several forms of hydrous oxide is presented. The method by which sulfate ion binds to the surface of zirconia particles is explored.
A. Clearfield +2 more
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Zirconia and Y-doped zirconia aerogels and xerogels
Journal de Chimie Physique, 1996Des aerogels de zircone pure et dopee a l'yttrium ont ete synthetises par voie sol-gel en utilisant les techniques supercritiques et hydrothermales. La voie hydrothermale conduit a la formation de particules primaires de ZrO 2 cristallise constituees d'un melange de phases tetragonale et moniclinique tandis que la voie supercritique conduit a des ...
MSW Vong, PA Sermon, Y Sun
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Aluminothermic Reduction of Zirconia
Journal of the European Ceramic Society, 2004Results are presented for the reaction of aluminium metal with zirconia ceramics under (reducing) sintering conditions. Aluminothermic reduction is a form of self-sustaining high-temperature synthesis (SHS). During reaction the principal phase formed is zirconium monoxide which is shown to have a rock-salt cubic structure and a unit-cell dimension of 0.
Xiaoli Zhe, C.A. Dioka, A. Hendry
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Zirconia in biomedical applications
Expert Review of Medical Devices, 2016The use of zirconia in medicine and dentistry has rapidly expanded over the past decade, driven by its advantageous physical, biological, esthetic, and corrosion properties. Zirconia orthopedic hip replacements have shown superior wear-resistance over other systems; however, risk of catastrophic fracture remains a concern.
Yen-Wei, Chen +3 more
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Electrolytic deposition of zirconia and zirconia organoceramic composites
Materials Letters, 2000Abstract Thin films of zirconia and an organoceramic composite consisting of zirconium hydroxide and poly(diallyldimethylammonium chloride) (PDDA) were obtained via cathodic electrodeposition. Films up to 10-μm-thick were obtained on Ni and porous Ni–yttria-stabilized zirconia (YSZ) cermet substrates. By varying the current density, concentrations of
I Zhitomirsky, A Petric
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Hydrothermal Crystallization of Zirconia and Zirconia Solid Solutions
Journal of the American Ceramic Society, 1991Zirconia as well as yttria‐zirconia and calcia‐zirconia solid‐solution powders were crystallized under hydrothermal conditions from (co)precipitated hydroxides. The morphology of the powder particles is strongly dependent on the crystallization conditions. The powders crystallized in a water solution of Na, K, and Li hydroxides show elongated particles
Waldemar Pyda +2 more
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Performance of zirconia implants
Evidence-Based Dentistry, 2019Design A prospective, controlled clinical study, conducted at least in part in practice, to compare approximal plaque index (API), sulcus bleeding index (SBI), periodontal probing depth (PPD), probing attachment level (PAL), creeping or recession of the mucosa/gingiva (CR/REC) and pink esthetic (PE) scores between Z-look 3 Implant System dental ...
Wilson, Nairn H F, Blum, Igor R
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A Review on Translucent Zirconia.
The European journal of prosthodontics and restorative dentistry, 2018Zirconia is suggested in many clinical situations due to acceptable biocompatibility, lower price compared with gold restorations, and better appearance than traditional metal ceramic restorations. New translucent monolithic zirconia has been developed to merge strength with improved tooth-colour matching.
S, Ghodsi, Z, Jafarian
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Zirconia and Implant Dentistry
2014The use of zirconia, that is, zirconium dioxide (ZrO2), as a biomaterial in biomedicine started in the early 1980s. Since then, a growing number of laboratory and clinical studies has been conducted on this special ceramics to assess its unique characteristics.
Matinlinna, JP, Aboushelib, MN
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