Effect of oxidation degree on electromagnetic properties of Mn-Zn ferrite

Author

Suh, J.J. ; Han, Y.H. ; Shin, M.S. ; Song, B.M.

Author_Institution

Sungkyunkwan Univ., Suwon, South Korea

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3448

Lastpage

3450

Abstract

The effect of oxygen partial pressure during sintering process on the electromagnetic properties of Mn-Zn ferrites has been studied. Equilibrium oxygen partial pressure was precisely controlled according to log Po₂=A-14540/T(K). At low oxygen partial pressure, significant Zn volatilization as well as loss of oxygen was observed. As the oxygen parameter (A) decreased from 8.2 to 7.6, the power loss minimum and the second maximum of initial permeability moved to lower temperatures. These shifts were not clearly observed with oxygen parameters below 7.6. The core sintered at A=7.0 showed the prominent second permeability peak

Keywords

ceramics; ferrites; magnetic leakage; magnetic permeability; manganese compounds; oxidation; sintering; stoichiometry; zinc compounds; Mn-Zn ferrite; MnZnFe₂O₄; Zn volatilization; electromagnetic properties; equilibrium oxygen partial pressure; initial permeability; oxidation; oxygen partial pressure; power loss minimum; second permeability peak; sintering; Atmosphere; Ceramics; Conductivity; Cooling; Ferrites; Oxidation; Permeability; Pressure control; Temperature control; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800553

Filename

800553