Preparation and Microstructure of Spinel Zinc Ferrite ZnFe2O4 by Co-precipitation Method

被引：0

作者：

任平 ^{[1
]}

机构：

[1] Department of Energy Sources and Environment Engineering,Shanghai University of Electric Power

来源：

Journal of Wuhan University of Technology(Materials Science) | 2009年 / 06期

基金：

上海市自然科学基金; 美国国家科学基金会;

关键词：

zinc ferrites; ZnFe2O4; microstructures; co-precipitation;

D O I：

暂无

中图分类号：

TG146.13 [];

学科分类号：

080502 ;

摘要：

Spinel zinc ferrites ZnFe2O4, prepared by co-precipitation method using the zinc nitrate Zn(NO3)2·6H2O and ferric nitrate Fe(NO3)3·2H2O as the raw materials, were characterized by the thermo gravimetric analysis (TG) and differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscope (SEM). The influence of synthesis conditions, such as Zn/Fe molar ratio, pH value, the sintering temperature and time, on the microstructures was detailedly investigated. The relationships between the microstructures and the synthesis conditions were discussed. The results show that the pure spinel zinc ferrites ZnFe2O4 are formed when the Zn/Fe molar ratio is 1.05∶2 at pH=8.5 or Zn/Fe molar ratio is 1∶2 at Ph=9-10, and the precursors are sintered at 1100 ℃ for 4 h. Especially no other phases are observed when the Zn/Fe molar ratio is 1∶2 at pH=10 and the precursor is sintered above 700 ℃ for 4 h. The higher sintering temperature and longer sintering time contribute to grain growth.

引用

页码：927 / 930

页数：4

共 9 条

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