Preparation of Machinable Zirconia Ceramics as a Dental Prosthetic Material

Abstract

Abstract: The zirconia ceramic as a dental prosthetic material was prepared by liquid-phase sintering with CaO₂-Al₂O₃
-SiO₂ glass as the sintering aid. And the bending strength, fracture toughness, thermal expansion and machinable property of the sintered bodies
were valued. The results obtained show that (1) CaO₂-Al₂O₃-SiO₂ glass is effective to lower the sintering temperature of zirconia ceramic
to 1300℃; (2) the machinability of the dental prosthetic zirconia ceramic is comparable to that of In-Ceram; (3) its thermal expansion coefficient is 8.15～
7.19×10^-6/℃, bending strength is 360～340MPa and fracture toughness is 3.5～2.7MPa·m^1/2.

Key words: zirconia ceramics, machinable, dental prosthetic material, preparation

CLC Number:

TQ174

RONG Tian-Jun,ZHAO Yun-Feng,WANG Shi-Wei,ZHANG Yu-Feng,HUNAG Xiao-Xian,GUO Jing-Kun. Preparation of Machinable Zirconia Ceramics as a Dental Prosthetic Material[J]. Journal of Inorganic Materials.

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Preparation of Machinable Zirconia Ceramics as a Dental Prosthetic Material

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