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1. 发明公开

EP3276645A1 METHOD FOR PRODUCING SINTERED BODY THAT FORMS RARE-EARTH PERMANENT MAGNET AND HAS NON-PARALLEL EASY MAGNETIZATION AXIS ORIENTATION 有权
标题翻译：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
申请人： Nitto Denko Corporation
发明人： 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分类号： H01F41/02 , H01F1/057 , H01F1/08 , H01F7/02 , H02K1/27
CPC分类号： H01F1/086 , H01F1/057 , H01F1/0577 , H01F7/02 , H01F41/0273 , H01F41/028 , H01F41/0293 , H02K1/27
摘要： 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.
摘要翻译：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。

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