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    FERROMAGNETIC PARTICLES AND PROCESS FOR PRODUCING THE SAME, AND ANISOTROPIC MAGNET, BONDED MAGNET AND COMPACTED MAGNET
    1.
    发明申请
    FERROMAGNETIC PARTICLES AND PROCESS FOR PRODUCING THE SAME, AND ANISOTROPIC MAGNET, BONDED MAGNET AND COMPACTED MAGNET 有权
    产生它们的非离子表面活性剂及其制备方法，和各向异性磁体，粘结磁体和压电磁体

    公开(公告)号：US20140001398A1

    公开(公告)日：2014-01-02

    申请号：US13980703

    申请日：2012-01-19

    申请人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

    发明人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

    IPC分类号： H01F1/01 ,  H01F41/00

    CPC分类号： H01F1/01 ,  B22F1/02 ,  B22F9/22 ,  B22F2999/00 ,  C01B21/0622 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/42 ,  C22C21/00 ,  C22C29/16 ,  H01F1/065 ,  H01F1/083 ,  H01F1/086 ,  H01F41/00 ,  H01F41/0266 ,  B22F2201/013

    摘要： The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles. The ferromagnetic particles comprising an Fe16N2 compound phase in an amount of not less than 80% as measured by Mössbauer spectrum and each having an outer shell in which FeO is present in the form of a film having a thickness of not more than 5 nm according to the present invention can be produced by subjecting iron oxide or iron oxyhydroxide having an average major axis diameter of 40 to 5000 nm and an aspect ratio (major axis diameter/minor axis diameter) of 1 to 200 as a starting material to dispersing treatment to prepare aggregated particles; subjecting the iron compound particles passed through a mesh to hydrogen reducing treatment at a temperature of 160 to 420° C.; and then subjecting the resulting particles to nitridation treatment at a temperature of 130 to 170° C.

    摘要翻译： 本发明涉及从工业观点出发具有高纯度和优异磁特性的铁磁性颗粒以及制造铁磁性颗粒的方法，并且还提供了各向异性磁体，粘结磁体和压实磁体，它们通过使用 铁磁颗粒。 所述铁磁性粒子包含通过Mössbauer光谱测定的不小于80％的Fe 16 N 2化合物相，并且每个具有外壳，其中FeO以厚度不超过5nm的膜的形式存在，根据 本发明可以通过使平均长轴直径为40〜5000nm，长径比（长轴径/短轴直径）为1〜200的氧化铁或羟基氧化铁作为起始原料进行分散处理而制备 聚集颗粒; 使通过网的铁化合物颗粒在160〜420℃的温度下进行氢还原处理。 然后在130〜170℃的温度下对得到的粒子进行氮化处理。

    PROCESS FOR PRODUCING FERROMAGNETIC PARTICLES, ANISOTROPIC MAGNET, BONDED MAGNET AND COMPACTED MAGNET
    4.
    发明申请
    PROCESS FOR PRODUCING FERROMAGNETIC PARTICLES, ANISOTROPIC MAGNET, BONDED MAGNET AND COMPACTED MAGNET 审中-公开
    生产无机颗粒，异相磁铁，粘结磁体和压电磁铁的方法

    公开(公告)号：US20140085023A1

    公开(公告)日：2014-03-27

    申请号：US14113711

    申请日：2012-04-26

    申请人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

    发明人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

    IPC分类号： H01F1/01 ,  H01F41/02

    CPC分类号： H01F1/01 ,  B22F9/22 ,  C01B21/0622 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2006/12 ,  C01P2006/42 ,  C22C38/001 ,  C22C2202/02 ,  H01F1/065 ,  H01F1/083 ,  H01F41/0266

    摘要： The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles. The ferromagnetic particles comprising an Fe16N2 compound phase in an amount of not less than 80% as measured by Mössbauer spectrum and each having an outer shell in which FeO is present in the form of a layer having a thickness of not more than 5 nm according to the present invention can be produced by subjecting aggregated particles of an iron compound as a starting material whose primary particles have a ratio of [(average deviation of major axis lengths of particles)/(average major axis length of particles)] of not more than 50%, Uc of not more than 1.55, Cg of not less than 0.95, Cg2 of not less than 0.40, an average major axis length of 40 to 5000 nm, and an aspect ratio (major axis diameter/minor axis diameter) of 1 to 200, to dispersing treatment; then subjecting the iron compound particles passed through a mesh screen to reducing treatment at a temperature of 160 to 420° C.; and subjecting the resulting particles to nitridation treatment at a temperature of 130 to 170° C.

    摘要翻译： 本发明涉及从工业观点出发具有高纯度和优异磁特性的铁磁性颗粒以及制造铁磁性颗粒的方法，并且还提供了各向异性磁体，粘结磁体和压实磁体，它们通过使用 铁磁颗粒。 铁磁性颗粒包含通过Mössbauer光谱测量的不小于80％的Fe 16 N 2化合物相，并且每个具有外壳，其中FeO以厚度不大于5nm的层的形式存在，根据 本发明可以通过使铁化合物的凝集颗粒作为起始材料，其一次颗粒具有[（颗粒的长轴长度的平均偏差）/（颗粒的平均长轴长度）]的比例不大于 50％，Uc为1.55以下，Cg为0.95以上，Cg2为0.40以上，平均长轴长为40〜5000nm，纵横比（长轴径/短轴直径）为1 至200，分散处理; 然后使经过筛网的铁化合物粒子在160〜420℃的温度下进行还原处理。 并在130-170℃的温度下对所得颗粒进行氮化处理。