Low-temperature auto-combustion synthesis and magnetic properties of cobalt ferrite nanopowder

被引：180

作者：

Xiao, Shun Hua

Jiang, Wei Fen

Li, Long Yu

Li, Xin Jian ^{[1
]}

机构：

[1] Zhengzhou Univ, Dept Phys, Zhengzhou 450052, Peoples R China

[2] Zhengzhou Univ, Phys Mat Lab, Zhengzhou 450052, Peoples R China

[3] Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 106卷 / 01期

基金：

中国国家自然科学基金;

关键词：

cobalt ferrite (CoFe2O4); low-temperature auto-combustion; magnetic properties;

D O I：

10.1016/j.matchemphys.2007.05.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt ferrite (CoFe2O4) nanopowder was prepared by a low-temperature, auto-combustion method. The thermal evolution of the precursor, as well as the microstructure, morphology and magnetic properties of as-synthesized powder were studied. The results revealed that the synthetic process was a thermally induced redox reaction with carboxyl group as reductant and NO3-1 ions as oxidant. The grains observed in as-burnt powder were proved to be CoFe2O4 nanocrystallites with high dispersibility and low agglomeration. Both the saturation magnetization (My) and the remnant magnetization (M,) were found to be highly depending upon the annealing temperature. The highest coercivity (1373 Oe) was achieved by the sample annealed at 400 degrees C. Our results indicate that this method might provide a promising option for synthesizing high-quality CoFe2O4 nanopowder. (C) 2007 Published by Elsevier B.V.

引用

页码：82 / 87

页数：6

共 17 条

[1] Preparation of 15 mol% YO1.5-doped ThO2 disk electrolytes by a polymeric gel-combustion method [J].