Recent improvements of ferrite magnets

被引：21

作者：

Taguchi, H

机构：

[1] TDK Materials Research Center, Minamihatori, Narita, Chiba 286

来源：

JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C1期

关键词：

D O I：

10.1051/jp4:19971118

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This paper overviews recent improvements in the properties of ferrite magnets from two viewpoints; First, new processes for submicron-sized particles, for high orientation and for high density were studied in detail. As a result, high performance Sr-ferrite magnets with Br=0.44T (4.4kG) and HcJ=320kA/m (4.0kOe) were developed. Furthermore, by means of SiO2-SrO or SiO2-BaO addition, high performance Ba-Ferrite magnets with Br=0.43T (4.3kG), HcJ=290kA/m (3.6kOe) were obtained. At the same time, we discovered that it is possible to make equal the shrinkage ratio in the a- and c-axes. Second, (LiFe)ZnW-ferrite and Zn-substituted M-ferrite were investigated. Consequently, LaZn substituted SrM ferrite magnets were developed with extremely good properties, viz. Br=0.46T(4.6kG) and (BH)max=41kJ/m(3) (5.2MGOe).

引用

页码：299 / 302

页数：4

共 16 条

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