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    PERMANENT MAGNET AND METHOD FOR MANUFACTURING PERMANENT MAGNET
    2.
    发明申请
    PERMANENT MAGNET AND METHOD FOR MANUFACTURING PERMANENT MAGNET 审中-公开
    永磁体和制造永磁体的方法

    公开(公告)号：US20140301885A1

    公开(公告)日：2014-10-09

    申请号：US14241524

    申请日：2012-09-25

    Applicant: NITTO DENKO CORPORATION

    Inventor： Keisuke Taihaku ,  Takashi Ozaki ,  Katsuya Kume ,  Toshiaki Okuno ,  Izumi Ozeki ,  Tomohiro Omure ,  Takashi Yamamoto

    IPC: H01F1/08 ,  H01F41/02

    CPC classification number: H01F1/086 ,  B22F1/0074 ,  B22F1/025 ,  B22F9/023 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/001 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0572 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0293 ,  B22F9/04 ,  B22F3/10

    Abstract: In a permanent magnet and a manufacturing method thereof, entire magnet can be densely sintered without a gap between a main phase and a grain boundary phase. Fine powder of milled neodymium magnet is mixed with a solution containing an organometallic compound expressed with a structural formula, M-(OR)X, wherein M represents Cu, Al, Dy, Tb, V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, and X represents an arbitrary integer, to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. The magnet powder is desiccated and then held for several hours in hydrogen atmosphere at a pressure higher than normal atmospheric pressure, at 200-900 degrees Celsius for calcination process in hydrogen. The calcined powder after calcination process in hydrogen is held for several hours in vacuum at 200-600 degrees Celsius for dehydrogenation process.

    Abstract translation: 在永久磁铁及其制造方法中，可以将整个磁体密实烧结而不会在主相和晶界相之间产生间隙。 研磨的钕磁体的细粉末与含有结构式M-（OR）X表示的有机金属化合物的溶液混合，其中M表示Cu，Al，Dy，Tb，V，Mo，Zr，Ta，Ti，W 或Nb，R表示由直链或支链烃构成的取代基，X表示任意的整数，以使有机金属化合物均匀地附着在钕磁体粉末的粒子表面。 将磁体粉末干燥，然后在氢气气氛中在高于正常大气压的压力下，在200-900摄氏度下在氢气中煅烧过程保持数小时。 在氢气中煅烧过程中的煅烧粉末在200-600摄氏度的真空中在脱氢过程中保持数小时。

    RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET
    7.
    发明申请
    RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET 审中-公开
    稀土永磁体及制造稀土永磁体的方法

    公开(公告)号：US20140241929A1

    公开(公告)日：2014-08-28

    申请号：US14241511

    申请日：2012-09-25

    Applicant: NITTO DENKO CORPORATION

    Inventor： Takashi Ozaki ,  Katsuya Kume ,  Toshiaki Okuno ,  Izumi Ozeki ,  Tomohiro Omure ,  Keisuke Taihaku ,  Takashi Yamamoto

    IPC: H01F41/02 ,  H01F1/053

    CPC classification number: H01F41/0266 ,  B22F1/0074 ,  B22F1/025 ,  B22F3/1021 ,  B22F2999/00 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/001 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0536 ,  H01F1/0572 ,  H01F1/0577 ,  H01F41/0293 ,  B22F9/04

    Abstract: There are provided a rare-earth permanent magnet and a manufacturing method of the rare-earth permanent magnet with improved magnetic performance which is achieved through milling-ability-improved fine wet-milling step. In the method, coarsely milled magnet material is finely wet-milled in an organic solvent together with an organometallic compound expressed with a structural formula of M-(OR)x (M including at least one of Nd, Al, Cu, Ag, Dy, Tb, V, Mo, Zr, Ta, Ti, W, and Nb, R representing a substituent group consisting of a straight-chain or branched-chain hydrocarbon with carbon chain length of 2-16, and x representing an arbitrary integer) to obtain magnet powder and to make the organometallic compound adhere to particle surfaces of the magnet powder. Subsequently, the magnet powder having adhesion of the organometallic compound to particle surfaces thereof is formed into a formed body and sintered so as to obtain a permanent magnet 1.

    Abstract translation: 提供了一种稀土永磁体和具有改进的磁性能的稀土永磁体的制造方法，其通过研磨能力改善的细湿法研磨步骤来实现。 在该方法中，将粗磨的磁体材料与有机金属化合物一起在有机溶剂中与结构式M-（OR）x（M包括Nd，Al，Cu，Ag，Dy中的至少一种） ，Tb，V，Mo，Zr，Ta，Ti，W和Nb，R代表由碳链长度为2-16的直链或支链烃构成的取代基，x表示任意整数） 得到磁体粉末，使有机金属化合物附着在磁铁粉末的粒子表面。 随后，将有机金属化合物与其颗粒表面粘附的磁铁粉末形成为成形体并烧结以获得永磁体1。

    RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET
    9.
    发明申请
    RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET 审中-公开
    稀土永磁体及制造稀土永磁体的方法

    公开(公告)号：US20140145808A1

    公开(公告)日：2014-05-29

    申请号：US14233286

    申请日：2013-03-08

    Applicant: NITTO DENKO CORPORATION

    Inventor： Katsuya Kume ,  Toshiaki Okuno ,  Izumi Ozeki ,  Tomohiro Omure ,  Takashi Ozaki ,  Keisuke Taihaku ,  Takashi Yamamoto

    IPC: H01F1/053 ,  H01F41/02

    CPC classification number: H01F1/0536 ,  B22F1/0059 ,  B22F3/18 ,  B22F7/04 ,  B22F2003/185 ,  B22F2301/355 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/0266 ,  B22F2202/05

    Abstract: There are provided a rare-earth permanent magnet and a manufacturing method of a rare-earth permanent magnet capable of preventing deterioration of magnet properties. In the method, magnet material is milled into magnet powder. Next, a mixture 12 is prepared by mixing the magnet powder and a binder, and the mixture 12 is formed into a sheet-like shape to obtain a green sheet 14. Thereafter, magnetic field orientation is performed to the green sheet 14, which is then held for several hours in a non-oxidizing atmosphere at a pressure higher than normal atmospheric pressure, at 200 through 900 degrees Celsius for calcination. Thereafter, the calcined green sheet 14 is sintered at a sintering temperature. Thereby a permanent magnet 1 is manufactured.

    Abstract translation: 提供了一种能够防止磁体特性劣化的稀土永磁体和稀土永磁体的制造方法。 在该方法中，将磁体材料研磨成磁铁粉末。 接下来，通过混合磁体粉末和粘合剂来制备混合物12，并将混合物12形成为片状，得到生片14.此后，对生片14进行磁场取向 然后在高于正常大气压的压力的非氧化性气氛中，在200-900摄氏度下煅烧数次。 然后，烧结的生片14在烧结温度下烧结。 由此制造永磁体1。

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