Infuence of quencher on microstructure and magnetic properties of manganese-zinc ferrites

被引：0
|
作者：
Li, Lezhong [1 ]
Lan, Zhongwen [1 ]
Zhong, Yu [1 ]
Ke, Sun [1 ]
Ji, Haining [1 ]
机构：
[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 318卷 / 1-2期
关键词：
quencher; manganese-zinc ferrite; abnormal grain; power loss;
D O I：
10.1061/j.jmmm.2007.04.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of quencher after calcination on the microstructure and magnetic properties of manganese-zinc ferrites were investigated by measuring the magnetic properties, electrical resistivity and density. The powder of Mn0.68Zn0.25Fe2.07O4 composition was prepared by adopting the conventional ceramic technique. Toroidal cores were sintered at 1350 degrees C for 4 h in atmosphere controlled by using the equation for equilibrium oxygen partial pressure. The fracture surface micrographs of samples were observed by scanning electron microscope. The results show that the inner stress of calcined powder increases, abnormal grains of ferrite grow up, initial permeability goes down and power losses of ferrite rise with the increase in quenching temperature, and the microstructure and magnetic properties of manganese-zinc ferrites can be improved with the gradual cooling of calcined powder to room temperature ( 25 degrees C). (C) 2007 Elsevier B.V. All rights reserved.
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页码：39 / 43
页数：5
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