发明名称 |
Method of coating magnetic particles. |
摘要 |
<p>A magnetic dispersion is prepared by adjusting the pH of a mixture containing magnetic particles to a value which results in a positive electrostatic charge on the particles, while a mixture containing colloidal silica particles at the same pH results in negative electrostatic charges on the silica particles. Combining these mixtures causes the silica particles to coat and irreversibly bond to the magnetic particles resulting in better dispersion and less aggregation of the magnetic particles.</p> |
申请公布号 |
EP0035633(A1) |
申请公布日期 |
1981.09.16 |
申请号 |
EP19810100494 |
申请日期 |
1981.01.23 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HOMOLA, ANDREW MARIAN;RICE, SONDRA LEW |
分类号 |
G11B5/712;C09D5/23;C09D7/12;G11B5/842;H01F1/44;(IPC1-7):11B5/84 |
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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