发明名称 |
Magnetic powder and magnetic recording medium comprising the same |
摘要 |
Magnetic powder at least a part of particles of which have surface-adjacent layers comprising an aluminium-containing oxide of the corundum structure has high hardness so that a magnetic recording medium comprising a magnetic layer containing such magnetic powder has improved durability.
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申请公布号 |
US4874668(A) |
申请公布日期 |
1989.10.17 |
申请号 |
US19870070697 |
申请日期 |
1987.07.07 |
申请人 |
HITACHI MAXELL, LTD. |
发明人 |
ASADA, SEIICHI;SUEYOSHI, TOSHINOBU;MIYAKE, AKIRA |
分类号 |
G11B5/706;C01G49/06;C09D5/23;C09D7/12;G11B5/712;H01F1/11 |
主分类号 |
G11B5/706 |
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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