发明公开
- 专利标题： Magnetic composite particles for magnetic recording medium, process for producing the same and magnetic recording medium using the same
- 专利标题（中）： 磁性复合颗粒，其制备方法和含磁性记录介质
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申请号： EP00305310.5申请日： 2000-06-23
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公开(公告)号： EP1063639A1公开(公告)日： 2000-12-27
- 发明人: Hayashi, Kazuyuki , Ohsugi, Mineko , Kamigaki, Mamoru , Morii, Hiroko
- 申请人： Toda Kogyo Corporation
- 申请人地址： 1-2, Funairiminami 4-chome, Naka-ku Hiroshima-shi, Hiroshima-ken JP
- 专利权人： Toda Kogyo Corporation
- 当前专利权人： Toda Kogyo Corporation
- 当前专利权人地址： 1-2, Funairiminami 4-chome, Naka-ku Hiroshima-shi, Hiroshima-ken JP
- 代理机构： Woods, Geoffrey Corlett
- 优先权： JP17834999 19990624
- 主分类号： G11B5/712
- IPC分类号： G11B5/712 ; C09C3/12 ; C09C1/00 ; C09C3/10
摘要：
Magnetic composite particles suitable for use in a magnetic recording layer of magnetic recoding medium comprise:
(a) magnetic core particles having an average particle size of 0.01 to 0.3 µm; and
(b) from 0.1 to 20% by weight, based on the weight of said magnetic core particles, of inorganic particles which have an average particle size of 0.001 to 0.07 µm, which are fixed or anchored on the surface of each magnetic core particle through a silicon compound derivable from a tetraalkoxysilane and which comprise at least one inorganic compound selected from oxides, nitrides, carbides and sulfides containing aluminum, zirconium, cerium, titanium, silicon, boron or molybdenum.
(a) magnetic core particles having an average particle size of 0.01 to 0.3 µm; and
(b) from 0.1 to 20% by weight, based on the weight of said magnetic core particles, of inorganic particles which have an average particle size of 0.001 to 0.07 µm, which are fixed or anchored on the surface of each magnetic core particle through a silicon compound derivable from a tetraalkoxysilane and which comprise at least one inorganic compound selected from oxides, nitrides, carbides and sulfides containing aluminum, zirconium, cerium, titanium, silicon, boron or molybdenum.
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