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    Magnetic material
    3.
    发明申请
    Magnetic material 有权
    磁性材料

    公开(公告)号：US20080057352A1

    公开(公告)日：2008-03-06

    申请号：US11892911

    申请日：2007-08-28

    申请人： Shin-ichi Ohkoshi ,  Shunsuke Sakurai ,  Shiro Kuroki ,  Kimitaka Sato ,  Shinya Sasaki

    发明人： Shin-ichi Ohkoshi ,  Shunsuke Sakurai ,  Shiro Kuroki ,  Kimitaka Sato ,  Shinya Sasaki

    IPC分类号： G11B5/706 ,  B32B5/16 ,  C04B35/26

    CPC分类号： C01G49/06 ,  B82Y30/00 ,  C01P2002/72 ,  C01P2004/04 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/42 ,  G11B5/70642 ,  G11B5/714 ,  Y10T428/2982 ,  Y10T428/2991

    摘要： A magnetic material is provided that has an iron oxide phase whose principal phase is a crystal of a structure which has the same space group as ε-Fe2O3 crystal and in which Al is substituted for a portion of the Fe sites of the ε-Fe2O3 crystal. The molar ratio of Al to Fe in the iron oxide phase, when expressed as Al:Fe=x:(2−x), satisfies 0≦x≦1. The value of x is preferably in the range of 0.3 to 0.7. The average particle diameter of the powder determined from a TEM image is preferably 5 to 200 nm, more preferably 10 to 100 nm. The magnetic material has very high practical value because it enables the extremely high coercive force Hc of the ε-Fe2O3 crystal to be regulated to a level enabling utilization in magnetic recording medium and various other applications. The magnetic powder can be produced by a method combining the reverse micelle method and the sol-gel method.

    摘要翻译： 提供一种磁性材料，其具有氧化铁相，其主相是具有与ε-Fe 2 O 3结晶相同的空间基团的结构的晶体，并且在 该Al取代了ε-Fe 2 O 3结晶的一部分Fe位点。 当以Al:Fe = x：（2-x）表示时，氧化铁相中的Al与Fe的摩尔比满足0

    Magnetic material
    4.
    发明授权
    Magnetic material 有权
    磁性材料

    公开(公告)号：US07781082B2

    公开(公告)日：2010-08-24

    申请号：US11892911

    申请日：2007-08-28

    申请人： Shin-ichi Ohkoshi ,  Shunsuke Sakurai ,  Shiro Kuroki ,  Kimitaka Sato ,  Shinya Sasaki

    发明人： Shin-ichi Ohkoshi ,  Shunsuke Sakurai ,  Shiro Kuroki ,  Kimitaka Sato ,  Shinya Sasaki

    IPC分类号： G11B5/65

    CPC分类号： C01G49/06 ,  B82Y30/00 ,  C01P2002/72 ,  C01P2004/04 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/42 ,  G11B5/70642 ,  G11B5/714 ,  Y10T428/2982 ,  Y10T428/2991

    摘要： A magnetic material is provided that has an iron oxide phase whose principal phase is a crystal of a structure which has the same space group as ε-Fe2O3 crystal and in which Al is substituted for a portion of the Fe sites of the ε-Fe2O3 crystal. The molar ratio of Al to Fe in the iron oxide phase, when expressed as Al:Fe=x:(2−x), satisfies 0≦x≦1. The value of x is preferably in the range of 0.3 to 0.7. The average particle diameter of the powder determined from a TEM image is preferably 5 to 200 nm, more preferably 10 to 100 nm. The magnetic material has very high practical value because it enables the extremely high coercive force Hc of the ε-Fe2O3 crystal to be regulated to a level enabling utilization in magnetic recording medium and various other applications. The magnetic powder can be produced by a method combining the reverse micelle method and the sol-gel method.

    摘要翻译： 提供一种具有氧化铁相的磁性材料，该氧化铁相的主相是具有与Fe-Fe 2 O 3晶体相同空间基团的结构的结晶，并且其中Al代替一部分Fe基部分的Fe- Fe2O3晶体。 当以Al:Fe = x：（2-x）表示时，氧化铁相中的Al与Fe的摩尔比满足0