发明授权
- 专利标题： Ferrite magnet and method for producing same
- 专利标题（中）： 铁氧体磁铁及其制造方法
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申请号： US998762申请日： 1997-12-29
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公开(公告)号： US5958284A公开(公告)日： 1999-09-28
- 发明人: Takashi Takami , Yutaka Kubota , Yasunobu Ogata
- 申请人： Takashi Takami , Yutaka Kubota , Yasunobu Ogata
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi Metals, Ltd.
- 当前专利权人： Hitachi Metals, Ltd.
- 当前专利权人地址： JPX Tokyo
- 主分类号： C04B35/26
- IPC分类号： C04B35/26 ; C04B35/40 ; C04B35/35
摘要：
The ferrite magnet having a composition represented by the general formula: (A.sub.1-x R.sub.x)O.multidot.n�(Fe.sub.1-y M.sub.y).sub.2 O.sub.3 ! (by atomic ratio), wherein A is Sr and/or Ba, R is at least one element selected from the group consisting of La, Nd, Pr, Sm, Eu and Gd, La being indispensable, M is at least one element selected from the group consisting of Mn, Co and Ni, and x, y and n meet 0.05.ltoreq.x.ltoreq.0.5, x/(2.4n).ltoreq.y.ltoreq.x/(1.6n) and 5.4.ltoreq.n.ltoreq.6.0, respectively is produced by preparing a starting material powder having the above composition and an average particle size of 0.4-0.7 .mu.m, and subjecting the starting material powder to molding in a magnetic field and then to sintering.
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