发明授权
- 专利标题： Production of a magnetic powder having a high dispersibility
- 专利标题（中）： 制造具有高分散性的磁粉
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申请号： US473200申请日： 1983-03-08
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公开(公告)号： US4493874A公开(公告)日： 1985-01-15
- 发明人: Osamu Kubo , Tadashi Ido , Tutomu Nomura , Tatsumi Maeda
- 申请人： Osamu Kubo , Tadashi Ido , Tutomu Nomura , Tatsumi Maeda
- 申请人地址： JPX Kawasaki
- 专利权人： Tokyo Shibaura Denki Kabushiki Kaisha
- 当前专利权人： Tokyo Shibaura Denki Kabushiki Kaisha
- 当前专利权人地址： JPX Kawasaki
- 主分类号： C01G49/00
- IPC分类号： C01G49/00 ; C01G51/00 ; C03C10/00 ; G11B5/706 ; G11B5/712 ; H01F1/11 ; C04B35/26
摘要：
A hexagonal ferrite magnetic powder for high density magnetic recording, having an improved dispersibility in a binder or paint is obtained by melting a mixture of hexagonal ferrite-forming components and a glass-forming component, and rapidly cooling the resultant molten mixture to obtain an amorphous material. The amorphous material is thermally treated to precipitate fine particles of the hexagonal ferrite therein. The amorphous material containing the precipitated fine particles is dissolved such that the glass-forming component remains on each of said fine particles in an amount of 0.01 to 0.3% by weight based on the weight of the particles.
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