Mechanical Properties and Microstructure of Partially Sintered Zirconia Ceramics
Partially sintered zirconia ceramics (PSZCs) for dental uses were prepared from zirconia nano-powder via isostatic pressing and partially sintering.The open porosities,pore diameters,grain sizes and mechanical properties of the ceramics with different densities were studied.The results show that the pores formed in the PSZCs are all open pores,with a diameter distribution of 60nm~130nm and a grain size distribution of 120~170nm.The machinability becomes worse when the density of PSZC is higher than 75% of the theoretical density,so a ceramic named PSZC-70% with density of 70%TD was selected as the target material.Its bending strength is 168 MPa and fracture toughness is 1.8 MPa·m1/2.A dental restoration framework can be obtained via machining the PSZC-70% on a dental CAD/CAM system.
Dental ceramics Zirconia CAD/CAM Partially sintered
Shibao Li Zhaohui Chen Yimin Zhao Zhongyi Wang Lihui Tang Xinyi Zhao Jinwu Chen Cheng Xie Xiaona Li
Department of Dental Materials,School of Stomatology,Fourth Military Medical University,Xian 710032 Key Lab of Advanced Ceramic Fibers and Composites,College of Aerospace and Materials Engineering,Nat Department of Prosthodontics,School of Stomatology,Fourth Military Medical University,Xian 710032,P
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
1252-1254
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）