发明名称 |
PERMANENT MAGNET AND METHOD FOR PREPARATION THEREOF |
摘要 |
<p>A method for preparing a ferrite magnet, wherein a ferrite having a hexagonal W type magneto-plumbite structure is added to a ferrite which has a hexagonal M type magneto-plumbite structure and in which a part of Sr, Ba, Pb or Ca has been substituted with La and optionally at least one element selected from among rare earth elements including Y and Bi during pulverization to a fine powder; and a ferrite magnet prepared by using the method. The above method which comprises the addition of a ferrite having a hexagonal W type magneto-plumbite structure to a ferrite having a hexagonal M type magneto-plumbite structure during the pulverization allows the preparation of a ferrite magnet having improved magnetic characteristics with the addition of a reduced amount of an element such as Co, Ni, Mn or Zn.</p> |
申请公布号 |
WO02063641(A1) |
申请公布日期 |
2002.08.15 |
申请号 |
WO2002JP00995 |
申请日期 |
2002.02.06 |
申请人 |
SUMITOMO SPECIAL METALS CO., LTD.;ODA, ETSUSHI;HOSOKAWA, SEIICHI;TOYOTA, SACHIO |
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;(IPC1-7):H01F1/11 |
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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