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    METHOD FOR PRODUCING SINTERED BODY THAT FORMS RARE-EARTH PERMANENT MAGNET AND HAS NON-PARALLEL EASY MAGNETIZATION AXIS ORIENTATION
    1.
    发明公开
    METHOD FOR PRODUCING SINTERED BODY THAT FORMS RARE-EARTH PERMANENT MAGNET AND HAS NON-PARALLEL EASY MAGNETIZATION AXIS ORIENTATION 审中-公开
    生产稀土永磁体烧结体的方法和具有非平行易磁化轴取向的方法

    公开(公告)号：EP3276645A1

    公开(公告)日：2018-01-31

    申请号：EP16768881.1

    申请日：2016-03-24

    Applicant: Nitto Denko Corporation

    Inventor： FUJIKAWA Kenichi ,  KUME Katsuya ,  OUCHI Kazuo ,  HOSHINO Toshinobu ,  MORIMOTO Masakazu ,  ONO Hirofumi ,  NAKABAYASHI Katsuyuki ,  YAMAGUCHI Miho ,  MATSUO Hiroshi ,  OKUNO Toshiaki ,  FUJIHARA Makoto ,  IMOTO Eiichi ,  EBE Hirofumi ,  OMURE Tomohiro ,  OZEKI Izumi ,  YAMAMOTO Takashi ,  KATO Yuki ,  MATSUDA Tomoya ,  SAITO Shoichiro

    IPC: H01F41/02 ,  H01F1/057 ,  H01F1/08 ,  H01F7/02 ,  H02K1/27

    CPC classification number: H01F1/086 ,  H01F1/057 ,  H01F1/0577 ,  H01F7/02 ,  H01F41/0273 ,  H01F41/028 ,  H01F41/0293 ,  H02K1/27

    Abstract: Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. While keeping the first molded article at a temperature higher than the softening temperature of the resin, a parallel external magnetic field having parallel magnetic flux is imparted to the first molded article, and as a result, the axis of easy magnetization of the magnet material particles is oriented in parallel to the direction of the external magnetic field. Then, by subjecting the first molded article to a deforming force such as one that changes the horizontal cross-sectional shape of at least one section of a horizontal cross-section of the first molded article, a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the sintering temperature for a prescribed period of time. The resin inside the second molded article is vaporized, which forms a sintered body in which the magnet material particles are sintered to one another.

    Abstract translation: 本发明提供形成稀土类永久磁铁的烧结体的制造方法，该烧结体具有单一的烧结体和任意的形状，并且在多个任意的区域中对磁体材料粒子施加不同方向的易磁化轴取向。 该方法由混合树脂材料和含有稀土类物质的磁铁材料粒子而成的复合材料形成三维的第一成形体。 在将第一成形体保持在比树脂的软化温度高的温度的状态下，对第一成形体赋予平行磁通的平行的外部磁场，结果磁体材料粒子的易磁化轴 被定向为平行于外部磁场的方向。 然后，通过使第一模制品受到诸如改变第一模制品的水平横截面的至少一部分的水平横截面形状的变形力，形成第二模制品，其中取向 水平截面的至少一部分中的磁体材料粒子的易磁化轴的方向改变为与第一模制品的取向方向不同的方向。 将第二模塑制品加热到烧结温度并保持在烧结温度一段预定的时间。 第二模制品内部的树脂被气化，形成其中磁体材料颗粒彼此烧结的烧结体。

    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET
    7.
    发明公开
    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET 审中-公开
    永久性葡萄酒VERFAHREN ZUR HERSTELLUNG EINES PERMANENTMAGNETEN

    公开(公告)号：EP2503569A1

    公开(公告)日：2012-09-26

    申请号：EP11765488.9

    申请日：2011-03-28

    Applicant: Nitto Denko Corporation

    Inventor： OZEKI Izumi ,  KUME Katsuya ,  HIRANO Keisuke ,  OMURE Tomohiro ,  TAIHAKU Keisuke ,  HOSHINO Toshinobu ,  OZAKI Takashi

    IPC: H01F41/02 ,  B22F1/02 ,  B22F3/00 ,  H01F1/08 ,  C22C33/02 ,  C22C38/00

    CPC classification number: C22C33/0278 ,  B22F2998/10 ,  C22C38/002 ,  C22C38/005 ,  H01F1/0572 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/0293 ,  B22F9/04 ,  B22F3/02 ,  B22F3/101

    Abstract: There are provided a permanent magnet and a manufacturing method thereof capable of efficiently concentrating traces of Dy or Tb in grain boundaries of the magnet and sufficiently improving coercive force due to Dy or Tb while reducing amount of Dy or Tb to be used.
    To fine powder of milled neodymium magnet material is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR) x (M represents Dy or Tb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body compacted through powder compaction is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius for a hydrogen calcination process. Thereafter, through sintering process, the compact body is formed into a permanent magnet.

    Abstract translation: 提供了能够有效地将Dy或Tb的痕迹集中在磁体的晶界中的永磁体及其制造方法，并且在减少Dy或Tb的使用量的同时充分提高由Dy或Tb引起的矫顽力。 向研磨的钕磁体材料的细粉末中加入含有以M-（OR）x表示的有机金属化合物的有机金属化合物溶液（M表示Dy或Tb，R表示由直链或支链的 链烃，x表示任意的整数），以使有机金属化合物均匀地附着于钕磁体粉末的粒子表面。 此后，通过粉末压实压实的紧凑体在200-900摄氏度的氢气氛中保持数小时，以进行氢煅烧。 此后，通过烧结工艺，将紧凑体形成永磁体。

    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET
    8.
    发明公开
    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET 有权
    永磁体和永磁体的制造方法

    公开(公告)号：EP2506274A1

    公开(公告)日：2012-10-03

    申请号：EP11765492.1

    申请日：2011-03-28

    Applicant: Nitto Denko Corporation

    Inventor： OZEKI Izumi ,  KUME Katsuya ,  HIRANO Keisuke ,  OMURE Tomohiro ,  TAIHAKU Keisuke ,  OZAKI Takashi

    IPC: H01F41/02 ,  H01F1/053 ,  H01F1/08 ,  H02K15/03

    CPC classification number: H01F41/0266 ,  B22F2998/00 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0572 ,  H01F1/0577 ,  H01F1/086 ,  B22F9/22 ,  B22F2201/013 ,  B22F9/04

    Abstract: There are provided a permanent magnet and a manufacturing method thereof enabling carbon content contained in magnet particles to be reduced in advance before sintering even when wet milling is employed. Coarsely-milled magnet powder is further milled by a bead mill in a solvent together with an organometallic compound expressed with a structural formula of M-(OR) x (M represents V, Mo, Zr, Ta Ti W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the magnet powder. Thereafter, a compact body of compacted magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius to perform hydrogen calcination process. Thereafter, through sintering process, a permanent magnet 1 is formed.

    Abstract translation: 提供了一种永磁体及其制造方法，使得即使在使用湿磨时，也能够在烧结之前预先减少包含在磁体颗粒中的碳含量。 通过珠磨机将粗粉碎的磁体粉末与结构式为M-（OR）x（M表示V，Mo，Zr，Ta，Ti或W，R表示的金属化合物）一起在溶剂中进一步研磨 由直链或支链烃组成的取代基，x表示任意的整数），以使有机金属化合物均匀地附着于磁铁粉末的颗粒表面。 之后，在200〜900℃的氢气氛中，将压粉磁体粉末的致密体保持数小时，进行氢煅烧处理。 之后，通过烧结工艺形成永磁体1。

    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET
    9.
    发明公开
    PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET 有权
    永磁体和永磁体的制造方法

    公开(公告)号：EP2503573A1

    公开(公告)日：2012-09-26

    申请号：EP11765495.4

    申请日：2011-03-28

    Applicant: Nitto Denko Corporation

    Inventor： OZEKI Izumi ,  KUME Katsuya ,  HIRANO Keisuke ,  OMURE Tomohiro ,  TAIHAKU Keisuke ,  OZAKI Takashi

    IPC: H01F41/02 ,  B22F1/00 ,  B22F1/02 ,  C22C33/02 ,  C22C38/00 ,  H01F1/053 ,  H01F1/08

    CPC classification number: H01F41/0266 ,  C22C33/02 ,  C22C2202/02 ,  H01F1/0572 ,  H01F1/0577 ,  H01F1/086

    Abstract: There are provided a permanent magnet and a manufacturing method thereof capable of inhibiting grain growth of magnet grains having single domain particle size during sintering so as to improve magnetic properties. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR) x (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, X represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, the desiccated magnet powder is calcined by utilizing plasma heating and the powdery calcined body is sintered so as to form a permanent magnet 1.

    Abstract translation: 提供了一种永磁体及其制造方法，其能够抑制在烧结过程中具有单畴粒径的磁体颗粒的晶粒生长，从而改善磁性能。 向粉碎的钕磁体的细粉添加含有用结构式M-（OR）x表示的有机金属化合物的有机金属化合物溶液（M代表V，Mo，Zr，Ta，Ti，W或Nb，R代表取代基 由直链或支链烃形成的基团，X表示任意的整数），以使有机金属化合物均匀地附着于钕磁铁粉末的粒子表面。 之后，利用等离子体加热对干燥磁铁粉末进行煅烧，将粉末烧结体烧结而形成永久磁铁1。

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