Invention Grant
- Patent Title: Permanent magnet and method for manufacturing the same
- Patent Title (中): 永久磁铁及其制造方法
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Application No.: US12933180Application Date: 2009-03-17
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Publication No.: US09275778B2Publication Date: 2016-03-01
- Inventor: Izumi Ozeki , Katsuya Kume , Junichi Nakayama , Yuuki Fukuda , Toshinobu Hoshino , Tomokazu Horio
- Applicant: Izumi Ozeki , Katsuya Kume , Junichi Nakayama , Yuuki Fukuda , Toshinobu Hoshino , Tomokazu Horio
- Applicant Address: JP Osaka
- Assignee: NITTO DENKO CORPORATION
- Current Assignee: NITTO DENKO CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-069383 20080318
- International Application: PCT/JP2009/055168 WO 20090317
- International Announcement: WO2009/116532 WO 20090924
- Main IPC: H01F1/057
- IPC: H01F1/057 ; H01F1/055 ; H01F41/02 ; H01F41/16

Abstract:
The present invention relates to a permanent magnet obtained by wet-mixing a Dy compound or a Tb compound with a magnet raw material to coat a surface of the magnet raw material with the Dy compound or the Tb compound, and sintering a green sheet obtained by mixing the resulting magnet raw material with a resin binder and molding the resulting mixture. Since the present invention has the above-mentioned constitution, it becomes possible to sufficiently improve coercive force by Dy or Tb while decreasing the amount of Dy or Tb used. Further, it can be prevented that Dy or Tb is solid-solutionized in magnet particles to decrease residual magnetization.
Public/Granted literature
- US20110018664A1 PERMANENT MAGNET AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2011-01-27
Information query
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