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    • 9. 发明专利
    • Method of manufacturing rare earth magnet
    • 制造稀土磁铁的方法
    • JP2009302256A
    • 2009-12-24
    • JP2008154454
    • 2008-06-12
    • Tdk CorpTdk株式会社
    • BABA FUMITAKAMASUDA TAKESHI
    • H01F1/08C22C33/02C22C38/00H01F1/053H01F41/02
    • PROBLEM TO BE SOLVED: To provide a method of manufacturing a rare earth magnet which is improved in HcJ while maintaining sufficiently high Br even when raw material powder of rare earth alloy having a smaller particle size is used. SOLUTION: The method of manufacturing the rare earth magnet includes a molding process of obtaining a molding by subjecting raw material powder of the rare earth magnet to dry molding, and a burning process of burning the molding to obtain a sintered body of the rare earth magnet. The mean particle size of the raw material powder is ≤3.5 μm, a nitrogen content in the sintered body is larger than an oxygen content, and the total of the nitrogen content and oxygen content is ≤1,200 ppm. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种即使使用具有较小粒度的稀土合金的原料粉末,也能够保持足够高的Br,从而HcJ改善的稀土类磁铁的制造方法。 解决方案:制造稀土磁体的方法包括通过使稀土磁体的原料粉末进行干式成型获得成型体的模塑工艺,以及燃烧该模制物以获得烧结体的烧成工艺 稀土磁铁。 原料粉末的平均粒径≤3.5μm,烧结体中的氮含量大于氧含量,氮含量和氧含量的总和≤1,200ppm。 版权所有(C)2010,JPO&INPIT
    • 10. 发明专利
    • Method for producing raw material powder for rare earth-sintered magnet, and method for producing rare earth-sintered magnet
    • 用于生产用于稀土烧结磁体的原料粉末的方法和用于生产稀土烧结磁体的方法
    • JP2007039787A
    • 2007-02-15
    • JP2006050002
    • 2006-02-27
    • Tdk CorpTdk株式会社
    • BABA FUMITAKAENOKIDO YASUSHIISHIZAKA TSUTOMUMASUDA TAKESHI
    • B22F3/00B22F1/00B22F3/02C22C19/07C22C38/00H01F1/053H01F1/08H01F41/02
    • PROBLEM TO BE SOLVED: To produce a rare earth-sintered magnet having excellent magnetic properties using granules having excellent fluidity and capable of improving the dimensional precision of a molding and improving productivity. SOLUTION: The raw material powder of a rare earth-sintered magnet and metallic soap such as a stearic acid base lubricant or the like are pulverized to obtain pulverized powder. An organic liquid is added to the pulverized powder to obtain a mixture. Using the mixture, granules to which the pulverized powder is stuck by the organic liquid are produced, so as to obtain raw material powder for the rare earth-sintered magnet. The granules as the raw material powder for the rare earth-sintered magnet are charged to a die cavity, a magnetic field is applied to the granules, and also, molding is performed under pressure to obtain a molding. The molding is sintered, so as to obtain the rare earth-sintered magnet. COPYRIGHT: (C)2007,JPO&INPIT
    • 解决的问题:使用具有优异流动性的颗粒制造具有优异磁性的稀土烧结磁体,能够提高成型的尺寸精度并提高生产率。 解决方案:将稀土烧结磁体的原料粉末和硬脂酸基润滑剂等金属皂粉碎,得到粉碎粉末。 向粉碎粉末中加入有机液体,得到混合物。 使用该混合物,制造粉碎粉末被有机液体粘贴的颗粒,以获得稀土烧结磁体的原料粉末。 作为稀土烧结磁体的原料粉末的颗粒被加入到模腔中,对颗粒施加磁场,并且在压力下进行模塑以获得模​​塑。 将该成型体烧结,以获得稀土烧结磁体。 版权所有(C)2007,JPO&INPIT