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35 条记录 (耗时 0.021 秒)

    Method for preparation of sintered permanent magnet
    27.
    发明授权
    Method for preparation of sintered permanent magnet 有权
    烧结永磁体的制备方法

    公开(公告)号：US06368551B1

    公开(公告)日：2002-04-09

    申请号：US09641136

    申请日：2000-08-16

    申请人： Shigenobu Sekine ,  Yuko Kawasaki ,  Yoshiki Kuwabara ,  Hiroji Sato ,  Minoru Narita ,  Kazushi Suzuki ,  Koichi Tono ,  Keiji Okada ,  Kenji Sakaguchi ,  Mitsuhisa Hirata

    发明人： Shigenobu Sekine ,  Yuko Kawasaki ,  Yoshiki Kuwabara ,  Hiroji Sato ,  Minoru Narita ,  Kazushi Suzuki ,  Koichi Tono ,  Keiji Okada ,  Kenji Sakaguchi ,  Mitsuhisa Hirata

    IPC分类号： B22F312

    CPC分类号： H01F1/0577

    摘要： The method for preparation of sintered permanent magnets according to the present invention comprises the steps of: mixing fully fine powder of a crystalline mother alloy for permanent magnet containing a rare-earth element, Fe and B as the essential components with fine powder of zinc oxide, compaction molding the resulted mixture in the presence of a magnetic field, sintering the compacted mixture in vacuum to cause generation of oxygen and metallic zinc by thermal decomposition of the zinc oxide; segregation of a part of metallic component in the mother alloy at the boundary and inside of the mother alloy crystal; formation of amorphous metallic oxide by forced oxidation of the segregated metal with the generated oxygen; crystallization of the amorphous metallic oxide; formation of an epitaxial junction between the crystallized metallic oxide and the mother alloy crystal; and evaporation of the metallic zinc into the vacuum, and quenching the sintered compact.

    摘要翻译： 根据本发明的烧结永磁体的制备方法包括以下步骤：将含有稀土元素，Fe和B的永磁体的结晶母合金的完全细粉末作为必要成分与氧化锌的细粉末混合 在磁场存在下压制成型所得到的混合物，在真空中烧结压实的混合物，以通过氧化锌的热分解产生氧和金属锌; 在母合金晶体的边界和内侧，母合金中的金属成分的一部分偏析; 通过用生成的氧强制氧化分离的金属形成非晶金属氧化物; 无定形金属氧化物的结晶; 在结晶的金属氧化物和母体合金晶体之间形成外延结; 并将金属锌蒸发到真空中，并淬火烧结体。

    Method of preparing raw material powder for permanent magnets superior in moldability
    28.
    发明授权
    Method of preparing raw material powder for permanent magnets superior in moldability 失效
    制备成型性优异的永磁体用原料粉末的方法

    公开(公告)号：US06103021A

    公开(公告)日：2000-08-15

    申请号：US112288

    申请日：1998-07-09

    申请人： Shigenobu Sekine ,  Hiroji Sato

    发明人： Shigenobu Sekine ,  Hiroji Sato

    IPC分类号： B22F9/22 ,  B22F1/00 ,  H01F1/057 ,  H01F1/059 ,  H01F1/06 ,  B22F9/00

    CPC分类号： H01F1/059 ,  B22F1/0007 ,  B22F1/0085 ,  H01F1/0571 ,  H01F1/0578 ,  B22F2999/00

    摘要： The present invention is directed to provide a method of preparing a raw material powder for permanent magnets superior in moldability, especially in moldability and productivity of bonded magnets. The method comprises subjecting an acicular iron powder having an aspect ratio of not smaller than 5:1 to heating at 800-900.degree. C. in fluidized state with a gas stream containing no oxygen until the acicular iron powder is transformed into a columnar shape iron powder having an aspect ratio of not larger than 3:1, a die-like shape iron powder or a spherical shape iron powder. The acicular iron powder may contain or may be attached by such a component effective for improving magnetic properties as a rare earth element metal, a rare earth element metal oxide, boron, cobalt and nickel.

    摘要翻译： 本发明的目的在于提供一种制备永久磁铁用原料粉末的方法，该成型性优异，特别是成形性和粘结磁铁的生产率。 该方法包括：使具有不小于5:1的纵横比的针状铁粉以不含氧的气流在流化状态下在800-900℃下加热，直到针状铁粉转变为柱状铁 长径比不大于3:1的粉末，模具状铁粉或球形铁粉。 针状铁粉可以含有或者可以通过这样一种有助于提高作为稀土元素金属，稀土元素金属氧化物，硼，钴和镍的磁性能的组分附着。

    Metal powder with nano-composite structure and its production method using a self assembling technique
    29.
    发明授权
    Metal powder with nano-composite structure and its production method using a self assembling technique 有权
    金属粉末纳米复合结构及其制备方法采用自组装技术

    公开(公告)号：US07547346B2

    公开(公告)日：2009-06-16

    申请号：US11369843

    申请日：2006-03-08

    申请人： Shigenobu Sekine

    发明人： Shigenobu Sekine

    IPC分类号： B22F9/06

    CPC分类号： H01F1/047 ,  B22F1/0014 ,  B22F1/0048 ,  B22F9/008 ,  B22F9/10 ,  B22F2009/084 ,  B22F2009/0844 ,  B22F2009/086 ,  B22F2009/0876 ,  H01F1/0551 ,  H01F1/0571 ,  H01F1/0574

    摘要： Methods, apparatuses and systems for producing powder particles of extremely small, highly uniform spherical shape and high sphericity, composed of metal including single metals and alloys, including nanocomposite structures, using a self-assembling procedure. The invention further includes the produced spherical particles. The metal spherical particles are produced whereby molten metal, alloys or composites are directed onto a fast-rotating disk in an atmosphere containing one or more inert gases and small amounts of an oxidizing gas and the molten metal drops are dispersed as tiny droplets for a predetermined time using centrifugal force within a cooling-reaction gas, and then cooled rapidly to form solid spherical particles. The spherical particles comprise a crystalline, amorphous or porous composition, having a size of 1-300 μm±1% with a uniformity of size being ≦60-70% and a precise spherical shape of less than or equal to ±10%.

    摘要翻译： 使用自组装方法制造由包括单一金属和合金在内的金属（包括纳米复合结构）组成的极小，高度均匀的球形和高球形度的粉末颗粒的方法，装置和系统。 本发明还包括所生产的球形颗粒。 制造金属球形颗粒，其中熔融金属，合金或复合材料在含有一种或多种惰性气体和少量氧化气体的气氛中被引导到快速旋转盘上，并且熔融金属液滴以微小液滴分散在预定的 时间在冷却反应气体内使用离心力，然后迅速冷却，形成固体球形颗粒。 球形颗粒包含晶体，无定形或多孔组合物，其尺寸为1-300mum±1％，其尺寸均匀度为<= 60-70％，精确的球形形状小于或等于±10％。