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公开(公告)号：DE3165604D1
公开(公告)日：1984-09-27
申请号：DE3165604
申请日：1981-01-23
Applicant: IBM
Inventor： HOMOLA ANDREW MARIAN , RICE SONDRA LEW
Abstract: 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.
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