Sintering kinetics of α-Al2O3 powder

被引：64
|
作者：
Zeng, WM [1 ]
Gao, L [1 ]
Gui, LH [1 ]
Guo, JK [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
CERAMICS INTERNATIONAL | 1999年 / 25卷 / 08期
基金：
中国国家自然科学基金;
关键词：
powder; sintering; alpha-Al2O3; kinetics;
D O I：
10.1016/S0272-8842(99)00008-5
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The sintering kinetics of alpha-Al2O3 powder are reviewed in this paper. The initial sintering of alpha-Al2O3 micropowder and alpha-Al2O3 nanopowder is all controlled by grain boundary diffusion. The sintering kinetics dominate up to a relative density of 0.77, where the coarsening kinetics dominate during further densification. Herring's scaling law can be used to predict the approximate sintering temperature of alpha-Al2O3 powder and demonstrates that if the particle size can be reduced to < 20 nm, sintering below 1000 degrees C may be possible. (C) 1999 Elsevier Science Ltd and Techna S.r.l. All rights reserved.
引用
收藏
页码：723 / 726
页数：4
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