SUBMICRON MNXCO1FE2-XO4 SPINEL FERRITES - CATIONIC DISTRIBUTION AND REACTIVITY

被引：21

作者：

CHASSAING, I ^{[1
]}

PRESMANES, L ^{[1
]}

TAILHADES, P ^{[1
]}

ROUSSET, A ^{[1
]}

机构：

[1] UNIV TOULOUSE 3, CHIM MAT INORGAN LAB,CNRS,URA 1311, 118 ROUTE NARBONNE, F-31062 TOULOUSE, FRANCE

来源：

SOLID STATE IONICS | 1992年 / 58卷 / 3-4期

关键词：

D O I：

10.1016/0167-2738(92)90127-B

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Submicron MnxCo1Fe2-xO4 spinel particles with an acicular shape were prepared from oxalic precursors. It was shown, from X-ray measurements and thermogravimetric analyses, that the valences of the cobalt and manganese ions were +II and +III respectively. Because of their small crystallite sizes (45 nm), these ferrites particles can be oxidized giving defect spinel ferrites having both Mn3+ and Mn4+ ions on octahedral sites. In these ferrites the enthalpy of the octahedral Mn3+ ions oxidation was found to be close to -87 kJ mol-1.

引用

页码：261 / 267

页数：7

共 31 条

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