Effect of Sintering Temperature on Aging Resistance and Mechanical Properties of 3Y-TZP Dental Ceramic

作     者：张静超 ZHAO Yongqi LIAO Yunmao JIANG Li YUN Xiaofei 李伟 

作者机构：State Key Laboratory of Oral DiseasesSichuan UniversityChengdu 610041China West China College of StomatologySichuan UniversityChengdu 610041China Hainan Stomatological HospitalHaikou 570105China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2012年第27卷第2期

页      面：316-320页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Funded by the National High Technology Research and Development Program of China (No.2006AA03Z440) 

主　　题：3Y-TZP dental ceramic sintering temperature simulated oral environment lowtemperature aging 

摘      要：In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered at 1 350℃, 1 400 ℃, 1 450 ℃,1 500 ℃, respectively, then were treated by soaking in artificial saliva （65 ℃, pH=7） for two months. The treated specimens sintered at 1 350 ℃ showed there was no phase transformation but whose strength and toughnesswere significantly improved （P〈0.05）, while those sintered at 1 400 ℃- 1 500 ℃ revealed a small amount of phase transformation and insignificant mechanical reinforcement （P〉0.05）. No microcracks were detected but increment in lattice volume was found in all specimens. Lowering sintering temperature favors aging resistance and mechanical reinforcement of 3Y-TZP in a simulated oral environment.