Preparation and Characterization of Transparent Nanocrystailine Ceramics

摘要：

　　The transparent nanocrystalline MgAl2O4 spinel ceramics were synthesized at low-temperature and high-pressure conditions with low-cost nano-sized MgAl2O4 powder.The sintering characteristics of transparent nano-ceramics were investigated at 500~700℃ under 2 ~ 5 GPa.The optimal sintering condition for preparing transparent nano-ceramics was determined.The microstructure and phase composition of powder,as well as the microstructures,morphologies,optical properties,densities and mechanical properties of synthetic ceramics were investigated.The grain sizes of the synthetic ceramics are less than 100 nm,far smaller than those of usual transparent micron-ceramics,and the average grain size depends on the pressure and temperature.The transmittance at the saturation plateau can near 80%.The relative densities of all samples are less than 99%,however,they are highly transparent.The toughness,derived from energy dissipation,of the transparent nano-ceramics was investigated and was compared with that of transparent micron-ceramic.

关键词： Transparent nanocrystalline ceramic MgAl2O4

作者: Tiecheng Lu Xianghui Chang Jie Zhang Jianqi Qi Xiangjie Luo

作者单位: Department of Physics and Key Laboratory of Radiation Physics & Technology of Education Ministry,Sic Department of Physics and Key Laboratory of Radiation Physics & Technology of Education Ministry,Sic

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 402-406

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）