发明授权
- 专利标题： Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium
- 专利标题（中）： 磁性氧化铁颗粒，其制造方法和磁记录介质
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申请号： US12164申请日： 1993-01-28
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公开(公告)号： US5449565A公开(公告)日： 1995-09-12
- 发明人: Koso Aoki , Hiroshi Sumita , Nanao Horiishi
- 申请人： Koso Aoki , Hiroshi Sumita , Nanao Horiishi
- 申请人地址： JPX Hiroshima
- 专利权人： Toda Kogyo Corporation
- 当前专利权人： Toda Kogyo Corporation
- 当前专利权人地址： JPX Hiroshima
- 优先权： JPX4-056370 19920205
- 主分类号： C01G49/00
- IPC分类号： C01G49/00 ; G11B5/706 ; G11B5/712 ; H01F1/11 ; G11B5/016
摘要：
Disclosed herein are magnetic composite iron oxide particles comprising spinel-type Fe.sub.3 O.sub.4 particles as core particles and spinel-type CoFe.sub.2 O.sub.4 outerlayer of the composite iron oxide particles, a process for producing the same, and a magnetic recording medium comprising a substrate and a magnetic recording layer containing the said magnetic iron oxide particles.
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