EFFECT OF OXYGEN CONTENT DURING SINTERING ON THE LOSSES OF MnZn FERRITES

被引：2

作者：

Janasi, Suzilene Real ^{[1
]}

Lazaro-Colan, Victoria A. ^{[2
]}

Landgraf, Fernando J. G. ^{[4
]}

de Campos, Marcos Flavio ^{[3
]}

机构：

[1] BRATS Sintered Filters & Special Metal Powders, Av Antonio Joao Abdalla 200, BR-07750000 Cajamar, SP, Brazil

[2] Univ Sao Paulo, EPUSP DEM, BR-05508970 Sao Paulo, Brazil

[3] Fed Fluminense Univ, PUVR, BR-27255125 Volta Redonda, RJ, Brazil

[4] Inst Technol Res, IPT, BR-05508900 Sao Paulo, SP, Brazil

来源：

20TH BRAZILIAN CONFERENCE ON MATERIALS SCIENCE AND ENGINEERING | 2014年 / 775-776卷

关键词：

MnZn ferrites; sintering; magnets; diffusion coefficients; magnetic loss; MAGNETIC-PROPERTIES; ZN FERRITES; GRAIN-SIZE; TEMPERATURE; MODEL;

D O I：

10.4028/www.scientific.net/MSF.775-776.404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic properties of MnZn ferrites are highly influenced by the partial oxygen pressure during sintering. In this work MnZn ferrites with different chemical compositions were pressed in a toroidal form and sintered at 1290 degrees C for 6 h at different oxygen pressures. X ray diffraction using K-edge radiation of Fe, Zn and Mn were performed in order to identify the atomic preference in the MnZn ferrite spinel structure, by means of Rietveld analysis. Magnetic losses were measured at 25 degrees C and 100 degrees C (200mT, 100 kHz). The high temperature loss decreased with the increase of oxygen content during sintering whereas at room temperature this effect was opposite. The losses behavior as function of frequency was analyzed according the loss separation model.

引用

页码：404 / +

页数：3

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