发明授权
- 专利标题： Method of manufacturing hexagonal ferrite magnetic powder, magnetic recording medium and method of manufacturing the same
- 专利标题（中）： 六方铁氧体磁粉的制造方法，磁记录介质及其制造方法
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申请号： US12750225申请日： 2010-03-30
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公开(公告)号： US08419966B2公开(公告)日： 2013-04-16
- 发明人: Shiho Kamisawa , Toshio Tada , Nobuo Yamazaki
- 申请人： Shiho Kamisawa , Toshio Tada , Nobuo Yamazaki
- 申请人地址： JP Tokyo
- 专利权人： FUJIFILM Corporation
- 当前专利权人： FUJIFILM Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP2009-086560 20090331
- 主分类号： C04B35/26
- IPC分类号： C04B35/26 ; C04B35/64
摘要：
An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture comprising a hexagonal ferrite-forming component and a glass-forming component; rapidly cooling the melt to obtain an amorphous material comprising 0.3 to 2.0 weight percent of carbon atoms; heating the amorphous material to a temperature range of 580 to 700° C. and maintaining the amorphous material within the temperature range to precipitate hexagonal ferrite magnetic particles; and collecting the hexagonal ferrite magnetic particles precipitated.
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