发明授权
- 专利标题: Anisotropic rare earth-iron based resin bonded magnet
- 专利标题(中): 各向异性稀土 - 铁基树脂粘结磁铁
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申请号: US12853601申请日: 2010-08-10
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公开(公告)号: US08329056B2公开(公告)日: 2012-12-11
- 发明人: Fumitoshi Yamashita , Osamu Yamada , Shiho Ohya
- 申请人: Fumitoshi Yamashita , Osamu Yamada , Shiho Ohya
- 申请人地址: JP Nagano
- 专利权人: Minebea Co., Ltd.
- 当前专利权人: Minebea Co., Ltd.
- 当前专利权人地址: JP Nagano
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2009-223908 20090929
- 主分类号: H01F1/08
- IPC分类号: H01F1/08
摘要:
Anisotropic rare earth-iron based resin bonded magnet comprises: [1] a continuous phase including: (1) a spherical Sm2Fe17N3 based magnetic material covered with epoxy oligomer where its average particle size is 1 to 10 μm, its average aspect ratio ARave is 0.8 or more, and mechanical milling is not applied after Sm—Fe alloy is nitrided; (2) a linear polymer with active hydrogen group reacting to the oligomer; and (3) additive; and [2] a discontinuous phase being an Nd2Fe14B based magnetic material coated with the epoxy oligomer where its average particle size is 50 to 150 μm, and its average aspect ratio ARave is 0.65 or more, further satisfying: [3] the air-gap ratio of a granular compound on the phases is 5% or less; and [4] a composition where crosslinking agent with 10 μm or less is adhered on the granular compound is formed at 50 MPa or less.
公开/授权文献
- US20110074531A1 ANISOTROPIC RARE EARTH-IRON BASED RESIN BONDED MAGNET 公开/授权日:2011-03-31
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