DISSOLUTION OF NIFE2O4 PARTICLES IN A NIO MATRIX

被引：7

作者：

SUMMERFELT, SR ^{[1
]}

CARTER, CB ^{[1
]}

机构：

[1] UNIV MINNESOTA, DEPT CHEM ENGN & MAT SCI, MINNEAPOLIS, MN 55455 USA

来源：

ACTA METALLURGICA ET MATERIALIA | 1992年 / 40卷 / 10期

关键词：

D O I：

10.1016/0956-7151(92)90350-N

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A TEM sample containing NiFe2O4 particles in a NiO matrix was subjected to a series of heat treatments in air and then characterized between heat treatments. Spinel particles between 75 and 100 nm in size were observed after a 1000-degrees-C heat treatment but had disappeared after a 1015-degrees-C heat treatment. According to the Ni-Fe-O phase diagram, a TEM sample containing 4 cation-% Fe should contain spinel particles up to 1200-degrees-C. This discrepancy between the experimentally observed temperature at which spinel dissolved and the temperature predicted by the phase diagram is discussed in terms of the Gibbs-Thomson effect.

引用

页码：2799 / 2804

页数：6

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