发明授权
- 专利标题: Permanent magnet and method for preparation thereof
- 专利标题(中): 永磁体及其制备方法
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申请号: US10466935申请日: 2002-02-06
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公开(公告)号: US06955768B2公开(公告)日: 2005-10-18
- 发明人: Etsushi Oda , Seiichi Hosokawa , Sachio Toyota
- 申请人: Etsushi Oda , Seiichi Hosokawa , Sachio Toyota
- 申请人地址: JP Osaka
- 专利权人: Neomax Co., Ltd.
- 当前专利权人: Neomax Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Nixon Peabody LLP
- 代理商 Jeffrey L. Costellia
- 优先权: JP2001-030364 20010207; JP2001-243821 20010810
- 国际申请: PCT/JP02/00994 WO 20020206
- 国际公布: WO02/06364 WO 20020815
- 主分类号: C04B35/40
- IPC分类号: C04B35/40 ; C01G49/00 ; C04B35/26 ; G11B5/706 ; H01F1/10 ; H01F1/11 ; H01F1/113 ; H01F1/34 ; H01F41/02
摘要:
A ferrite magnet obtained by adding a ferrite having a spinel-type structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof. By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.
公开/授权文献
- US20040061090A1 Permanent magnet and method for preparation thereof 公开/授权日:2004-04-01