发明授权
- 专利标题: R-t-b sintered magnet and rare earth alloy
- 专利标题(中): R-t-b烧结磁体和稀土合金
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申请号: US10567502申请日: 2004-08-10
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公开(公告)号: US07534311B2公开(公告)日: 2009-05-19
- 发明人: Hiroyuki Tomizawa , Yutaka Matsuura
- 申请人: Hiroyuki Tomizawa , Yutaka Matsuura
- 申请人地址: JP 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: JP Tokyo
- 代理机构: Keating & Bennett, LLP
- 优先权: JP2003-292194 20030812
- 国际申请: PCT/JP2004/011743 WO 20040810
- 国际公布: WO2005/015580 WO 20050217
- 主分类号: H01F1/08
- IPC分类号: H01F1/08
摘要:
A rare-earth sintered magnet according to the present invention, of which the main phase is an R2T14B type compound phase, includes: 27 mass % through 32 mass % of R, which is at least one rare-earth element that is selected from the group consisting of Nd, Pr, Tb, and Dy and that always includes at least one of Nd and Pr; 60 mass % through 73 mass % of T, which is either Fe alone or a mixture of Fe and Co; 0.85 mass % through 0.98 mass % of Q, which is either B alone or a mixture of B and C and which is converted-into B on a number of atoms basis when its mass percentage is calculated; more than 0 mass % through 0.3 mass % of Zr; at most 2.0 mass % of an additive element M, which is at least one element selected from the group consisting of Al, Cu, Ga, In and Sn; and inevitably contained impurities.
公开/授权文献
- US20060201585A1 R-t-b sintered magnet and rare earth alloy 公开/授权日:2006-09-14
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