发明名称 |
Preparation of rare earth permanent magnet material |
摘要 |
A method for preparing a rare earth permanent magnet material comprises the steps of: disposing a powder comprising one or more members selected from an oxide of R2, a fluoride of R3, and an oxyfluoride of R4 wherein R2, R3 and R4 each are one or more elements selected from among rare earth elements inclusive of Y and Sc on a sintered magnet form of a R1—Fe—B composition wherein R1 is one or more elements selected from among rare earth elements inclusive of Y and Sc, and then heat treating the magnet form and the powder at a temperature equal to or below the sintering temperature of the magnet in vacuum or in an inert gas. The result high performance, compact or thin permanent magnet has a high remanence and coercivity at a high productivity.
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申请公布号 |
US8377233(B2) |
申请公布日期 |
2013.02.19 |
申请号 |
US201113033943 |
申请日期 |
2011.02.24 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD.;NAKAMURA HAJIME;HIROTA KOICHI;MINOWA TAKEHISA |
发明人 |
NAKAMURA HAJIME;HIROTA KOICHI;MINOWA TAKEHISA |
分类号 |
H01F1/03;B22F3/00;C04B35/64;H01F1/00;H01F1/04;H01F1/14 |
主分类号 |
H01F1/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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