发明申请
- 专利标题: RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING RARE EARTH PERMANENT MAGNET
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申请号: US15118116申请日: 2014-02-12
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公开(公告)号: US20170178773A1公开(公告)日: 2017-06-22
- 发明人: Izumi OZEKI , Katsuya KUME , Toshiaki OKUNO , Takashi OZAKI , Tomohiro OMURE , Keisuke TAIHAKU , Takashi YAMAMOTO
- 申请人: NITTO DENKO CORPORATION
- 申请人地址: JP Ibaraki-shi, Osaka
- 专利权人: NITTO DENKO CORPORATION
- 当前专利权人: NITTO DENKO CORPORATION
- 当前专利权人地址: JP Ibaraki-shi, Osaka
- 国际申请: PCT/JP2014/053113 WO 20140212
- 主分类号: H01F1/053
- IPC分类号: H01F1/053 ; B22F9/04 ; C22C1/04
摘要:
Provided are a rare-earth permanent magnet whose magnet density after sintering is very high and a method for manufacturing a rare-earth permanent magnet. Thus, a magnet raw material is milled into magnet powder, and then, a compound 12 is formed by mixing the magnet powder thus milled with a binder. Next, the compound 12 thus formed is subjected to a hot-melt molding onto a supporting substrate 13 so as to form a green sheet 14 molded to a sheet-like shape. Thereafter, while the green sheet 14 thus molded is softened by heating, magnetic field orientation is carried out by applying a magnetic field to the green sheet 14 thus heated; and further, the green sheet 14 having been subjected to the magnetic field orientation is calcined by a vacuum sintering, which is further followed by a pressure sintering to produce a permanent magnet 1.
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