发明授权
- 专利标题： Process for producing cobalt-containing magnetic iron oxide powder
- 专利标题（中）： 含钴磁性氧化铁粉末的制造方法
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申请号： US715775申请日： 1985-03-25
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公开(公告)号： US4594267A公开(公告)日： 1986-06-10
- 发明人: Ichiro Honma , Masaharu Hirai , Masatoshi Amano , Nobusuke Takumi
- 申请人： Ichiro Honma , Masaharu Hirai , Masatoshi Amano , Nobusuke Takumi
- 申请人地址： JPX Osaka
- 专利权人： Ishihara Sangyo Kaisha, Ltd.
- 当前专利权人： Ishihara Sangyo Kaisha, Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX57-215172 19821208
- 主分类号： C01G49/00
- IPC分类号： C01G49/00 ; G11B5/706 ; H01F1/11 ; C01G49/06
摘要：
A cobalt-containing magnetic iron oxide powder is provided by first coating a magnetic iron oxide base powder with a ferrous compound and then coating it with a cobalt compound. The cobalt-containing magnetic iron oxide powder provided is improved in stability of coercivity under aging and various other magnetic properties, and the magnetic tape produced by using the powder is also appreciably improved in stability of coercivity under aging as well as in various magnetic properties such as squareness, orientability and switching field distribution.
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