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Permanent magnet and method for preparation thereof 发明授权

2023-08-21 2640 1202K 0

专利信息

申请日期 2025-07-10 申请号 US10451906
公开(公告)号 US7144642B2 公开(公告)日 2006-12-05
公开国别 US 申请人省市代码 全国
申请人 Etsushi Oda; Seiichi Hosokawa; Sachio Toyota
简介 A ferrite magnet obtained by adding a ferrite having a hexagonal W-type magnetoplumbite 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.


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