发明名称 |
RARE EARTH PERMANENT MAGNETS AND THEIR PREPARATION |
摘要 |
A sintered magnet body (R a T 1 b M c B d ) coated with a powder mixture of an intermetallic compound (R 1 i M 1 j , R 1 x T 2 y M 1 z , R 1 i M 1 j H k ), alloy (M 1 d M 2 e ) or metal (M 1 ) powder and a rare earth (R 2 ) oxide is diffusion treated. The R 2 oxide is partially reduced during the diffusion treatment, so a significant amount of R 2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence. |
申请公布号 |
PH12012000096(A1) |
申请公布日期 |
2015.11.09 |
申请号 |
PH12012000096 |
申请日期 |
2012.04.30 |
申请人 |
SHIN-ETSU CHEMICAL CO. LTD. |
发明人 |
NAGATA, HIROAKI;NOMURA, TADAO;MINOWA, TAKEHISA |
分类号 |
H01F41/02 |
主分类号 |
H01F41/02 |
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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