Preparation of nanoscale high-purity α-alumina powders

被引：2

作者：

Wu, Xiu-Lan ^{[1
]}

Ren, Qiang ^{[1
]}

He, Xuan-Meng ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xianyang, Peoples R China

来源：

HIGH-PERFORMANCE CERAMICS IV, PTS 1-3 | 2007年 / 336-338卷

关键词：

boehmite; alpha-Al2O3; high-purity nanopowders;

D O I：

10.4028/www.scientific.net/KEM.336-338.2051

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：

High-purity nanoscale alpha-alumina powders with high specific surface area were prepared from boehmite powders synthesized by the method of aluminium isopropoxide hydrolysis. The physiochemical transformation of boehmite powders under heat-treatment was investigated. The results showed that the reaction progress of boehmite under heat-treatment is as follows: AlO(OH) -> Al2O3 (amorphous) -> gamma-Al2O3 -> delta-Al2O3 -> alpha-Al2O3. The phase transformation from delta-Al2O3 to alpha-Al2O3 begins at 1050 degrees C, and the alpha-Al2O3 grains growth accelerates as temperature increases. High-purity alpha-Al2O3 nanometer powders with higher specific surface area can be obtained after incineration at 1100 degrees C for 4 h.

引用

页码：2051 / +

页数：2