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1. 发明公开

EP3276642A1 SINTERED BODY FOR FORMING RARE-EARTH MAGNET, AND RARE-EARTH SINTERED MAGNET 无效
标题翻译：用于形成稀土磁体的烧结体和稀土烧结磁体
公开(公告)号：EP3276642A1
公开(公告)日：2018-01-31
申请号：EP16768882.9
申请日：2016-03-24
申请人： Nitto Denko Corporation
发明人： FUJIKAWA Kenichi , YAMAMOTO Takashi , EBE Hirofumi , FUJIHARA Makoto , IMOTO Eiichi , OMURE Tomohiro
IPC分类号： H01F7/02 , H01F1/057 , H01F1/08
CPC分类号： H01F1/0536 , B22F1/0062 , B22F2301/355 , B22F2304/10 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/16 , H01F1/057 , H01F1/08 , H01F7/02
摘要： Provided are: a sintered body that forms a rare-earth magnet and is configured in a manner such that the divergence between the orientation angles of the easy axes of magnetization of magnet material particles and the orientation axis angle of the magnet material particles is kept within a prescribed range in an arbitrary micro-section of a magnet cross-section; and a rare-earth sintered magnet. This sintered body for forming a rare-earth magnet has two or more different regions exhibiting an orientation axis angle of at least 20°, given that the orientation axis angle is defined as the highest-frequency orientation angle among the orientation angles of the easy magnetization axes, relative to a pre-set reference line, of a plurality of magnet material particles in a rectangular section at an arbitrary position in a plane including the thickness direction and the widthwise direction. The orientation-angle variance angle is 16.0° or less relative to said orientation axis angle, given that the orientation-angle variance angle is defined on the basis of the difference between the orientation angles of the easy magnetization axes of the magnet material particles. One embodiment defines said section as a rectangular section containing 30 or more magnet material particles, and for example, containing 200 or 300 magnet material particles. It is preferable for the rectangular section to be a square. Another embodiment defines said section as a square section having 35µm sides.
摘要翻译：本发明提供一种形成稀土类磁铁的烧结体，其以磁铁材料粒子的易磁化轴的取向角度与磁铁材料粒子的取向轴角度之间的偏差保持在在磁体横截面的任意微区中的规定范围; 和稀土烧结磁体。该稀土类磁铁形成用烧结体具有取向轴角度为20°以上的两个以上的不同区域，将取向轴角度定义为易磁化取向角度中的最高频率取向角度在包括厚度方向和宽度方向的平面中的任意位置处，矩形截面中的多个磁体材料颗粒相对于预设基准线的轴线。假定基于磁体材料颗粒的易磁化轴的取向角度之间的差定义取向角变化角，则取向角变化角相对于所述取向轴角为16.0°或更小。一个实施例将所述部分定义为包含30个或更多个磁体材料颗粒的矩形部分，并且例如包含200或300个磁体材料颗粒。矩形部分最好是正方形。另一个实施例将所述部分限定为具有35μm侧的正方形截面。

2. 发明公开

EP3518259A1 SINTERED COMPACT FOR FORMING RARE EARTH SINTERED MAGNET, AND METHOD FOR MANUFACTURING SAME 有权
公开(公告)号：EP3518259A1
公开(公告)日：2019-07-31
申请号：EP17853196.8
申请日：2017-09-25
申请人： Nitto Denko Corporation
发明人： FUJIKAWA Kenichi , OZEKI Izumi , YAMAMOTO Takashi , EBE Hirofumi , NOBUTA Takuya
IPC分类号： H01F41/02 , B22F1/00 , B22F3/00 , B22F3/10 , B22F3/14 , B22F3/24 , C21D6/00 , H01F1/057 , H02K15/03 , C22C38/00
摘要： A method comprises: charging a rare-earth magnet-forming material comprising magnet material particles into a mold, in a state in which an easy magnetization axis of each of the magnet material particles is oriented in one plane; sintering the rare-earth magnet-forming material charged in the mold by heating the rare-earth magnet-forming material to a sintering temperature while applying a given magnitude of pressing force to the rare-earth magnet-forming material, to thereby form a sintered body in which the magnet material particles are integrally sintered; and then subjecting the sintered body to high-temperature heat treatment, under a pressure lower than the pressing force during the sintering and under a maximum achieving temperature which ranges from greater than 900°C to 1100°C, and whose difference from a maximum achieving temperature during the pressure sintering is within 250°C.

3. 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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