A STUDY OF THE FORMATION OF SILICA-SUPPORTED MIXED MAGNESIUM-MANGANESE SPINEL OXIDES FROM MULTICOMPONENT GELS

被引：2

作者：

AMMUNDSEN, B ^{[1
]}

BURNS, GR ^{[1
]}

AMRAN, A ^{[1
]}

FRIBERG, SE ^{[1
]}

机构：

[1] CLARKSON UNIV,CTR ADV MAT PROC,POTSDAM,NY 13699

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1995年 / 4卷 / 01期

关键词：

MAGNESIUM MANGANATE; SPINEL; MULTICOMPONENT GELS; COMPOSITE MATERIALS;

D O I：

10.1007/BF00486699

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 effects of thermal treatment on composite materials prepared by the gelation of sols comprising large concentrations of metal oxide precursor salts have been investigated, in order to determine the compositional and thermal requirements for forming spinel magnesium manganates in such systems. The preparative technique has been found to give rise to derived gel materials in which the metal oxide phase, in the form of regular spherical particles, is dispersed throughout a continuous silica matrix. Silica-supported mixed magnesium and manganese spinel oxide phases were obtained for systems comprising at least 30 wt% metal nitrate after heating to temperatures between 700 and 850-degrees-C, but not without concomitant formation of Mn2O3 and modification of the silica network by magnesium.

引用

页码：23 / 29

页数：7

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