Synthesis of Cr2O3 nanoparticles by mechanochemical processing

被引：110

作者：

Tsuzuki, T ^{[1
]}

McCormick, PG ^{[1
]}

机构：

[1] Univ Western Australia, Special Res Ctr Adv Mineral & Mat Proc, Perth, WA 6907, Australia

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 11期

关键词：

powder processing; ceramics; nanoparticles; mechanochemical reaction; ultrafine powder;

D O I：

10.1016/S1359-6454(00)00100-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The synthesis of chromium oxide (Cr2O3) nanoparticles by mechanochemical reaction and subsequent heat treatment was investigated. A solid-state displacement reaction Na2Cr2O7 + S-->Cr2O3 + Na2SO4 was induced during mechanical milling of Na2Cr2O7 + S powder mixture, forming amorphous Cr2O3 nanoparticles. Annealing the as-milled powder under vacuum above 520 degrees C resulted in the formation of crystalline Cr2O3 nanoparticles separated from each other in a salt matrix. A simple washing process to remove the matrix yielded Cr2O3 particles of 10-80 nm in size, having a plate-like morphology. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：2795 / 2801

页数：7

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