Evaluation of NiFe2O4 ferrite nanocrystalline powder synthesized by a sol-gel auto-combustion method

被引：65

作者：

Ebrahimi, S. A. Seyyed ^{[1
]}

Azadmanjiri, J. ^{[1
]}

机构：

[1] Univ Tehran, Sch Met & Mat Engn, Ctr Excellence Magnet Mat, Tehran 14174, Iran

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2007年 / 353卷 / 8-10期

关键词：

ceramics; nanocrystals; powders; nanoparticles; sol-gels (xerogels);

D O I：

10.1016/j.jnoncrysol.2006.12.044

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：

Nanocrystalline NiFe2O4 ferrite powder was prepared by a sol-gel auto-combustion method from metal nitrates and citric acid. The combustion process is an oxidation-reduction reaction in which the NO3- ion is oxidant and the carboxyl group is reductant. The thermal analysis of nitrate-citrate gels and the phase evolution of as-burnt powder with the different ratios of Fe/Ni and calcined powder were investigated by DTA/TG and XRD techniques respectively. SEM and Hysteresigraph were also used to characterize the microstructure and magnetic properties of the products. The results revealed that the nitrate-citrate gel exhibits a self-propagating combustion behavior. By using this novel auto-combustion method, NiFe2O4 ferrite powder was obtained with crystallite size of 20-40 nm and suitable soft magnetic properties. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：802 / 804

页数：3

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