Direct synthesis of nanocrystalline, spherical α-Mn2O3 particles by mechanochemical reduction

被引：15

作者：

Billik, P. ^{[1
]}

Caplovicova, M. ^{[2
]}

Janata, J. ^{[1
]}

Fajnor, V. S. ^{[1
]}

机构：

[1] Comenius Univ, Fac Nat Sci, Dept Inorgan Chem, Bratislava 84215, Slovakia

[2] Comenius Univ, Fac Nat Sci, Dept Geol & Mineral Deposits, Bratislava 84215, Slovakia

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 6-7期

关键词：

high-energy milling; powder technology; nanomaterials; crystalline oxides; manganese oxide;

D O I：

10.1016/j.matlet.2007.07.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The preparation of nanocrystalline alpha-Mn2O3 by using the mechanochemical reduction of KMnO4 with NH4Cl in stoichiometric ratio 1:1 was investigated in this work. High-energy milling with ball to powder mass ratio 20:1 and centrifugal forces 60 g lead to the completion of the reaction between the reactants after 10 min. Further 15-60 min milling transforms the amorphous and hydrated Mn2O3 to the nanocrystalline alpha-Mn2O3 phase. This synthesis involves a direct preparing of alpha-Mn2O3 with spherical geometry and average XRD crystallite size above 50 nm. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1052 / 1054

页数：3

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