发明授权
US07879469B2 Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium
有权
铁氧体磁体粉末，烧结磁体，粘结磁体和磁记录介质
- 专利标题： Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium
- 专利标题（中）： 铁氧体磁体粉末，烧结磁体，粘结磁体和磁记录介质
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申请号： US10538485申请日： 2004-02-05
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公开(公告)号： US07879469B2公开(公告)日： 2011-02-01
- 发明人: Yoshihiko Minachi , Noboru Ito
- 申请人： Yoshihiko Minachi , Noboru Ito
- 申请人地址： JP
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JP
- 代理机构： Adli Law Group P.C.
- 代理商 Dariush G. Adli
- 优先权： JP2003-047857 20030225
- 国际申请： PCT/JP2004/001207 WO 20040205
- 国际公布： WO2004/077458 WO 20040910
- 主分类号： G11B5/65
- IPC分类号： G11B5/65
摘要：
A ferrite magnet powder is represented by the composition formula AFe2+a(1-x)MaxFe3+bO27, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represents at least one element selected from the group consisting of Zn, Co, Mn, and Ni, and wherein 0.05≦x≦0.80, 1.5≦a≦2.2, and 12≦b≦17. A high saturation magnetization 4πIs can be achieved by the partial substitution of the Fe2+ site of a W-type ferrite with an element M such as Zn within a certain range.
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