| 发明名称 |
MAGNETIC RECORDING POWDER, METHOD OF MANUFACTURING THEREOF AND APPLICATION THEREOF |
| 摘要 |
A matnetic recording powder comprising a hexagonal barium ferrite substituted with a coercive force control element. This magnetic powder is preliminarily treated with sulfate ion-containing water so as to convert any free barium ions in the magnetic powder to a water insoluble compound such as BaSO4 or BaS2O7. There is also proposed a magnetic recording medium having a magnetic layer containing such a magnetic powder as mentioned above. |
| 申请公布号 |
EP0161767(B1) |
申请公布日期 |
1989.02.01 |
| 申请号 |
EP19850302140 |
申请日期 |
1985.03.27 |
| 申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
YOKOYAMA, HIROTAKA C/O PATENT DIVISION;IDO, TADASHI C/O PATENT DIVISION;MAEDA, TATSUMI C/O PATENT DIVISION;KURISU, SHUNJI C/O PATENT DIVISION |
| 分类号 |
G11B5/706;(IPC1-7):G11B5/706;H01F1/11 |
主分类号 |
G11B5/706 |
| 代理机构 |
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