| 发明名称 |
WERKWIJZE VOOR HET VERVAARDIGEN VAN NAALDVORMIGE DEELTJES DIE KUNNEN WORDEN GEBRUIKT VOOR MAGNETISCHE REGISTRATIEMEDIA. |
| 摘要 |
Acicular hyper-magnetite particles, that is, acicular particles of (FeO)xFe2O3 where x is greater than one and not greater than 1.5, are provided with coatings of a cobalt compound, the cobalt providing 1% to 10% of the total weight of the particles. The particles provide superior magnetic recording media. |
| 申请公布号 |
NL188483(B) |
申请公布日期 |
1992.02.03 |
| 申请号 |
NL19770011724 |
申请日期 |
1977.10.26 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY TE ST. PAUL, MINNESOTA, VER. ST. V. AM. |
发明人 |
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| 分类号 |
G11B5/712;C01G49/00;C01G49/08;C09D5/23;C09D7/12;G11B5/706;G11B5/84;H01F1/11;(IPC1-7):H01F1/11 |
主分类号 |
G11B5/712 |
| 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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