发明名称 |
METHOD FOR THE PREPARATION OF FERRITE CALCINED BODY |
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. <IMAGE> |
申请公布号 |
EP1365423(A1) |
申请公布日期 |
2003.11.26 |
申请号 |
EP20020711354 |
申请日期 |
2002.02.06 |
申请人 |
SUMITOMO SPECIAL METALS COMPANY LIMITED |
发明人 |
ODA, ETSUSHI;HOSOKAWA, SEIICHI;TOYOTA, SACHIO |
分类号 |
C04B35/40;C01G49/00;C04B35/26;G11B5/706;H01F1/10;H01F1/11;H01F1/113;H01F1/34;H01F41/02 |
主分类号 |
C04B35/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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