发明名称 |
A composite rare-earth anisotropic bonded magnet, composite rare-earth anisotropic bonded magnet compound, and methods for their production |
摘要 |
<p>The bonded magnet of the present invention, in which average particle diameter and compounding ratio are specified, is comprised of Cobalt-less R1 d-HDDR coarse magnet powder that has been surface coated with surfactant, R2 fine magnet powder that has been surface coated with surfactant (R1 and R2 are rare-earth metals), and a resin which is a binder. The resin, a ferromagnetic buffer in which R2 fine magnet powder is uniformly dispersed, envelops the outside of the Cobalt-less R1 d-HDDR coarse magnet powder. Despite using Cobalt-less R1 d-HDDR anisotropic magnet powder, which is susceptible to fracturing and therefore vulnerable to oxidation, the bonded magnet of the present invention exhibits high magnetic properties along with extraordinary heat resistance.</p> |
申请公布号 |
EP1523017(B1) |
申请公布日期 |
2008.08.13 |
申请号 |
EP20040024073 |
申请日期 |
2004.10.08 |
申请人 |
AICHI STEEL CORPORATION |
发明人 |
HONKURA, YOSHINOBU;HAMADA, NORIHIKO;MITARAI, HIRONARI;NOGUCHI, KENJI |
分类号 |
H01F1/057;H01F1/059;H01F1/06;H01F1/08;H01F41/02 |
主分类号 |
H01F1/057 |
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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