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90 条记录 (耗时 0.082 秒)

    Sintered magnet
    1.
    发明授权
    Sintered magnet 有权
    烧结磁体

    公开(公告)号：US09129731B2

    公开(公告)日：2015-09-08

    申请号：US13572812

    申请日：2012-08-13

    申请人： Matahiro Komuro ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

    发明人： Matahiro Komuro ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

    IPC分类号： H01F7/02 ,  H01F1/01 ,  H01F1/057

    CPC分类号： H01F1/0572 ,  H01F1/0577 ,  H01F1/0579

    摘要： Disclosed is a sintered magnet which is a rare-earth magnet using a less amount of a rare-earth element but having a higher maximum energy product and a higher coercivity. The sintered magnet includes a NdFeB crystal; and an FeCo crystal adjacent to the NdFeB crystal through the medium of a grain boundary. The FeCo crystal includes a core and a periphery and has a cobalt concentration decreasing from the core to the periphery. The FeCo crystal has a difference in cobalt concentration of 2 atomic percent or more between the core and the periphery. In the NdFeB crystal, cobalt and a heavy rare-earth element are unevenly distributed and enriched in the vicinity of the grain boundary.

    摘要翻译： 公开了一种使用少量稀土元素但具有较高最大能量积和较高矫顽力的稀土类磁体的烧结磁体。 烧结磁体包括NdFeB晶体; 以及通过晶界的介质与NdFeB晶体相邻的FeCo晶体。 FeCo晶体包括芯和周边，并且具有从芯到周边的钴浓度降低。 FeCo晶体在芯和周边之间的钴浓度不同于2原子％以上。 在NdFeB晶体中，钴和重稀土元素不均匀分布并富集在晶界附近。

    Magnetic material and motor using the same
    2.
    发明授权
    Magnetic material and motor using the same 有权
    磁性材料和电机使用相同

    公开(公告)号：US08821649B2

    公开(公告)日：2014-09-02

    申请号：US13029348

    申请日：2011-02-17

    申请人： Takayuki Kanda ,  Matahiro Komuro ,  Hiroyuki Suzuki ,  Yuichi Satsu

    发明人： Takayuki Kanda ,  Matahiro Komuro ,  Hiroyuki Suzuki ,  Yuichi Satsu

    IPC分类号： H01F1/00 ,  H01F1/058

    CPC分类号： H01F1/058 ,  H01F1/0009 ,  H01F1/0555 ,  H01F1/0575 ,  H01F1/0596 ,  H01F41/0293

    摘要： Characteristics of a magnetic material are improved without using a heavy rare earth element as a scarce resource. By incorporating fluorine into a magnetic powder and controlling the crystal orientation in crystal grains, a magnetic material securing magnetic characteristics such as coercive force and residual flux density can be fabricated. As a result, the resource problem with heavy rare earth elements can be solved, and the magnetic material can be applied to magnetic circuits that require a high energy product, including various rotating machines and voice coil motors of hard discs.

    摘要翻译： 不使用重稀土元素作为稀有资源，磁性材料的特性得到改善。 通过将氟加入到磁性粉末中并控制晶粒中的晶体取向，可以制造确保矫顽磁力和残余磁通密度等磁特性的磁性材料。 结果，可以解决重稀土元素的资源问题，并且可以将磁性材料应用于需要高能量产物的磁路，包括各种旋转机器和硬盘的音圈电机。

    Sintered magnet and rotating machine equipped with the same
    4.
    发明授权
    Sintered magnet and rotating machine equipped with the same 有权
    烧结磁体和旋转机配备相同

    公开(公告)号：US07880357B2

    公开(公告)日：2011-02-01

    申请号：US12543068

    申请日：2009-08-18

    申请人： Hiroyuki Suzuki ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro ,  Takashi Yasuhara ,  Yutaka Matsunobu

    发明人： Hiroyuki Suzuki ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro ,  Takashi Yasuhara ,  Yutaka Matsunobu

    IPC分类号： H02K1/17 ,  H02K1/27 ,  H01F1/00

    CPC分类号： H02K1/2766 ,  H01F1/0577 ,  H01F41/0253 ,  H01F41/0293 ,  H02K1/02

    摘要： A sintered magnet and a rotating machine equipped therewith are disclosed, which include: crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or an oxyfluoride compound, containing at least one element selected from the group consisting of an alkali metal element, an alkaline earth metal element, and a rare earth element, the fluoride compound or the oxyfluoride compound being formed inside some of the crystal grains or in a part of a grain boundary part. The oxyfluoride compound or the fluoride compound contains carbon, and a grain boundary width of the ferromagnetic material is smaller than a grain boundary width of the ferromagnetic material in which the fluoride compound or the oxyfluoride compound is formed.

    摘要翻译： 公开了一种烧结磁铁及其旋转机械，它包括：主要由铁组成的铁磁性材料的晶粒和含有至少一种选自碱金属元素的元素的氟化物或氟氧化物， ，碱土金属元素和稀土元素，所述氟化物或氟氧化物化合物形成在一些晶粒内部或部分晶界部分中。 氟氧化物或氟化合物含有碳，铁磁材料的晶界宽度小于其中形成氟化物或氟氧化物的铁磁材料的晶界宽度。

    RARE EARTH MAGNET
    5.
    发明申请
    RARE EARTH MAGNET 有权
    稀土磁铁

    公开(公告)号：US20100194509A1

    公开(公告)日：2010-08-05

    申请号：US12696074

    申请日：2010-01-29

    申请人： Hiroyuki SUZUKI ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

    发明人： Hiroyuki SUZUKI ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

    IPC分类号： H01F7/02

    CPC分类号： C22C1/0441 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0293

    摘要： A rare earth magnet having a composition represented by RTB wherein R denotes a rare earth element, T a transition metal and B boron, the magnet being composed of magnet powder constituted by crystalline particles. The particles of the magnetic powder have a ratio of a short diameter being 10 μm or more to a long diameter is 0.5 or less. An element Rm having a magnetic anisotropy higher than that of the rare earth element is contained in the surface and inside of the magnet constituted by the magnet powder in an approximately constant concentration. An oxy-fluoride and carbon are present at boundaries of the particles of the magnet powder.

    摘要翻译： 具有由RTB表示的组成的稀土类磁体，其中R表示稀土元素，T是过渡金属和B硼，所述磁体由由结晶颗粒构成的磁体粉末组成。 磁粉的粒子的短径为10μm以上的长径比为0.5以下。 具有高于稀土元素的磁各向异性的元素Rm被包含在以大致恒定的浓度由磁体粉末构成的磁体的表面和内部。 氧氟化物和碳存在于磁体粉末颗粒的边界处。

    RARE EARTH ELEMENT MAGNET AND METHOD OF MANUFACTURING SAME
    8.
    发明申请
    RARE EARTH ELEMENT MAGNET AND METHOD OF MANUFACTURING SAME 失效
    稀土元素磁铁及其制造方法

    公开(公告)号：US20080117008A1

    公开(公告)日：2008-05-22

    申请号：US11943215

    申请日：2007-11-20

    申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Hiroyuki Suzuki

    发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Hiroyuki Suzuki

    IPC分类号： H01F7/02 ,  B22F3/12

    CPC分类号： H01F1/0576 ,  B22F3/26 ,  B22F2003/248 ,  B22F2009/048 ,  B22F2998/10 ,  C22C2202/02 ,  H01F41/0293 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/2991 ,  B22F9/04 ,  B22F3/02 ,  B22F3/24

    摘要： A magnet comprising magnetic powder containing at least one rare earth metal element, and an oxide binder for binding the magnetic powder, wherein an inter-face distance of the binder determined by diffraction analysis is 0.25 to 2.94 nm. The disclosure also discloses a method of manufacturing a magnet comprising; compacting magnetic powder containing at least one rare earth element under pressure in a mold; impregnating the compacted magnetic powder molding with a precursor solution of an oxide material; and heat-treating the compacted magnetic molding impregnated with the precursor thereby to impart an inter-face distance determined by diffraction analysis to the binder in the compacted molding. The distance is 0.25 to 2.94 nm.

    摘要翻译： 包含含有至少一种稀土金属元素的磁性粉末和用于粘结磁性粉末的氧化物粘合剂的磁体，其中通过衍射分析确定的粘合剂的面间距离为0.25至2.94nm。 本公开还公开了一种制造磁体的方法，包括： 在模具中压制含有至少一种稀土元素的压粉磁粉; 用氧化物材料的前体溶液浸渍压实的磁性粉末成型体; 并且对浸渍有前体的压制磁性成型体进行热处理，从而通过衍射分析确定在压制成型体中的粘合剂的面间距离。 距离为0.25至2.94nm。

    MRI apparatus with high-resistance magnet
    10.
    发明申请
    MRI apparatus with high-resistance magnet 失效
    具有高电阻磁铁的MRI装置

    公开(公告)号：US20070159171A1

    公开(公告)日：2007-07-12

    申请号：US11641757

    申请日：2006-12-20

    申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Katsumi Ishikawa ,  Takeyuki Itabashi

    发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Katsumi Ishikawa ,  Takeyuki Itabashi

    IPC分类号： G01V3/00

    CPC分类号： G01R33/383 ,  G01R33/3806 ,  G01R33/3873 ,  Y10T428/12014

    摘要： Eddy current generated around a magnetic circuit in an MRI apparatus is one of the causes of deviation from an ideal magnetic field gradient waveform and causes image distortion, loss of strength, ghost generation, loss of signal, and spectral distortion. An object of the present invention is to suppress the generation of the eddy current. In an MRI apparatus, a ferromagnetic material formed from powder is used in a part of a magnetic circuit: the powder mainly comprising a mother phase containing iron or cobalt and showing ferromagnetism; and a high-resistance layer having a resistance not less than ten times as high as the mother phase and a Vickers hardness lower than that of the mother phase being formed in layers along parts of the surface of the powder on parts or the entire of the surface.

    摘要翻译： 在MRI装置中围绕磁路产生的涡流是偏离理想磁场梯度波形的原因之一，并且导致图像失真，强度损失，重影产生，信号损失和光谱失真。 本发明的目的是抑制涡电流的产生。 在MRI装置中，在磁路的一部分中使用由粉末形成的铁磁材料，该粉末主要包含含有铁或钴的母相并显示出铁磁性; 以及耐电压不低于母相的十倍的高电阻层，维氏硬度低于母相的部分或全部沿着粉末表面的一部分形成的层， 表面。