发明授权
- 专利标题: Method for preparing rare earth permanent magnet
- 专利标题(中): 稀土永磁体的制备方法
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申请号: US11941127申请日: 2007-11-16
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公开(公告)号: US07883587B2公开(公告)日: 2011-02-08
- 发明人: Hajime Nakamura , Koichi Hirota , Takehisa Minowa
- 申请人: Hajime Nakamura , Koichi Hirota , Takehisa Minowa
- 申请人地址: JP Tokyo
- 专利权人: Shin-Etsu Chemical Co., Ltd.
- 当前专利权人: Shin-Etsu Chemical Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Westerman, Hattori, Daniels & Adrian, LLP
- 优先权: JP2006-311352 20061117
- 主分类号: H01F1/057
- IPC分类号: H01F1/057 ; H01F1/053
摘要:
A rare earth permanent magnet is prepared by providing a sintered magnet body consisting of 12-17 at % of rare earth, 3-15 at % of B, 0.01-11 at % of metal element, 0.1-4 at % of O, 0.05-3 at % of C, 0.01-1 at % of N, and the balance of Fe, disposing on a surface of the magnet body a powder comprising an oxide, fluoride and/or oxyfluoride of another rare earth, and heat treating the powder-covered magnet body at a temperature below the sintering temperature in vacuum or in an inert gas, for causing the other rare earth to be absorbed in the magnet body.
公开/授权文献
- US20080247898A1 METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET 公开/授权日:2008-10-09