发明申请
- 专利标题： Magnetic powder, magnetic recording medium using the same , and method for surface treatment of magnetic power
- 专利标题（中）： 磁粉，使用该磁粉的磁记录介质，以及磁力表面处理方法
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申请号： US10555638申请日： 2004-05-07
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公开(公告)号： US20060118206A1公开(公告)日： 2006-06-08
- 发明人: Kimitaka Sato
- 申请人： Kimitaka Sato
- 优先权： JP2003-129766 20030508
- 国际申请： PCT/JP04/06481 WO 20040507
- 主分类号： G11B5/708
- IPC分类号： G11B5/708 ; H01F1/04
摘要：
A magnetic powder composed primarily of Fe that has been surface-treated with a silane coupling agent, which magnetic powder is characterized in that it contains Co such that Co/Fe expressed in atomic percent is 20-50 at. %, Al such that Al/Fe expressed in atomic percent is 5-30 at. %, and one or more rare earth elements R (including Y) such that R/Fe expressed in atomic percent is 4-20 at. %, and has average particle diameter of smaller than 80 nm, TAP density of 0.7 g/cm3 or greater, ignition point of 165 ° C. or higher, and oxygen content of 26 wt % or less.