首页|Effects of Vacuum Heat Treatment of Nano Powder on Sintering of Transparent Nano-crystalline MgAl_2O_4 Ceramics

Effects of Vacuum Heat Treatment of Nano Powder on Sintering of Transparent Nano-crystalline MgAl_2O_4 Ceramics

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  • Trans Tech Publications Ltd
Nano-sized MgAl_2O_4 powders were treated at 500-1000℃ in a vacuum of 10~(-3) Pa for 2 h, and then sintered at 500～900℃ under 1～6 GPa. The powders with and without vacuum-heat-treatment were investigated by means of Transmission Electron Microscope (TEM) and Sedimentation Test. It was found that the vacuum-heat-treatment of nano powder could effectively get rid of the absorbed gas on the surface of nano-particles. Bulk nanostructured transparent ceramics without cracks were sintered easily with the treated nano-sized powder. The success rate of nano-sinterning of bulk transparent ceramics was greatly increased when a suitable vacuum-heat-treatment process was used for the starting nano-sized powder.

vacuum heat treatmentnano powdertransparent nano-crystalline MgAl_2O_4 ceramics

Xianghui Chang、Duanwei He、Jie Zhang、Yongtao Zou、Jianghua Wang、Tiecheng Lu

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Collegeof Physical Scienceand Technology, Southwest Jiaotong University, Chengdu 610031, China

Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

Department of Physics and Key Laboratory of Radiation Physics & Technology of Education Ministry, Sichuan University, Chengdu 610064, China

2010

10.4028/www.scientific.net/KEM.434-435.657

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.434/435
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