Synthesis of α-Al2O3 nanopowder by sol-freeze drying method

被引：11

作者：

Zeng, WM ^{[1
]}

Rabelo, AA ^{[1
]}

Tomasi, R ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, BR-13565905 Sao Carlos, SP, Brazil

来源：

ADVANCED POWDER TECHNOLOGY II | 2001年 / 189-1卷

关键词：

alumina; nanometric powders; sol-freeze drying; synthesis;

D O I：

10.4028/www.scientific.net/KEM.189-191.16

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：

alpha -Al2O3 nanopowder was synthesized by a sol-freeze drying-calcination method using AlCl3 . 6H(2)O as precursor for the aluminum chloride solution. Boehmite precipitate was first prepared by reaction of the AlCl3 solution with a NH3 solution. The precipitate was converted into a transparent sol by peptizing with nitric acid under controlled heating at 80 degreesC. After freeze drying the sol, a white boehmite powder was obtained. Finally, alpha -Al2O3 nanopowder with an equivalent diameter of 42 nm was obtained by calcination of the boehmite powder in air at 1100 degreesC for 1 h.

引用

页码：16 / 20

页数：5

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