Optimum power-loss and microstructure of MnZn ferrites under consideration of particle size

Author

Liu, C.S. ; Wu, J.M. ; Tsay, M.J. ; Chen, Chaoteng Jordan

Author_Institution

Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4860

Lastpage

4862

Abstract

This report deal with the influence of particle size of MnZn ferrite powder on the preparation of monodomain structure. It is found that when samples were sintered at low temperature (1170°C), the power loss and microstructure of MnZn ferrite prepared from powder particle size above 1.3 μm are dominated by sample density. On the other hand, the existence of silica still induce exaggerated grain growth for samples prepared from powder below 1 μm and added with CaO-SiO₂ more than 0.1 wt.%. In this study, sample prepared from powder with particle size of 1 μm and added by 0.07 wt.% CaO-SiO ₂ exhibits optimum power loss

Keywords

calcium compounds; eddy current losses; eddy currents; ferrites; grain growth; grain size; magnetic domains; magnetic particles; magnetic permeability; manganese compounds; silicon compounds; zinc compounds; 1 to 1.3 mum; 1170 C; Mn_0.72Zn_0.22Fe_2.06O₄:CaO,SiO₂; density; ferrite powder; grain growth; microstructure; monodomain structure; particle size; power loss; sintering; Chemical analysis; Ferrites; Frequency; Loss measurement; Materials science and technology; Microstructure; Powders; Power supplies; Scanning electron microscopy; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539176

Filename

539176