公开(公告)号：US07645349B2

公开(公告)日：2010-01-12

申请号：US11548101

申请日：2006-10-10

申请人： Nobuhiko Fujimori ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

发明人： Nobuhiko Fujimori ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

IPC分类号： H01F1/053 ,  H01F1/057

CPC分类号： C22C38/005 ,  H01F1/0577 ,  H01F41/0273

摘要： A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of R, which is at least one of rare earth elements including Y, 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein it is in the shape of a ring having an outer diameter of 10-100 mm, an inner diameter of 8-96 mm, and a height of 10-70 mm, with a plurality of magnetic poles axially extending on an outer circumferential surface. The distribution of a surface magnetic flux density B0 on magnetic poles in an axial direction of the ring magnet is in a range of 92.5% or more of the maximum of B0.

摘要翻译： 一种烧结永久磁铁，其特征在于，具有以质量计27〜33.5％的R为至少一种的稀土元素，所述稀土元素为Y，0.5〜2％的B，0.002〜0.15％的N，0.25％以下的稀土元素 O，0.15％以下的C和0.001-0.05％的P，余量为Fe，其中，其外径为10-100mm，内径为8-96mm的环形， 高度为10-70mm，多个磁极在外周面上轴向延伸。 表面磁通密度B0在环形磁铁的轴向上的磁极上的分布在B0的最大值的92.5％以上的范围内。

公开(公告)号：US20050067058A1

公开(公告)日：2005-03-31

申请号：US10680139

申请日：2003-10-08

申请人： Nobuhiko Fujimori ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

发明人： Nobuhiko Fujimori ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

IPC分类号： H01F1/057 ,  H01F41/02

CPC分类号： C22C38/005 ,  H01F1/0577 ,  H01F41/0273

摘要： A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of R, which is at least one of rare earth elements including Y. 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein it is in the shape of a ring having an outer diameter of 10-100 mm, an inner diameter of 8-96 mm, and a height of 10-70 mm, with a plurality of magnetic poles axially extending on an outer circumferential surface. The distribution of a surface magnetic flux density B0 on magnetic poles in an axial direction of the ring magnet is in a range of 92.5% or more of the maximum of B0.

摘要翻译： 一种烧结永久磁铁，其组成为质量比为27-33.5％的R，其为稀土元素中的至少一种，包括Y.0.5-2％的B，0.002-0.15％的N，0.25％或更少的 O，0.15％以下的C和0.001-0.05％的P，余量为Fe，其中，其外径为10-100mm，内径为8-96mm的环形， 高度为10-70mm，多个磁极在外周面上轴向延伸。 表面磁通密度B0在环形磁铁的轴向上的磁极上的分布在B0的最大值的92.5％以上的范围内。

公开(公告)号：US20080017277A1

公开(公告)日：2008-01-24

申请号：US11548101

申请日：2006-10-10

申请人： Nobuhiko FUJIMORI ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

发明人： Nobuhiko FUJIMORI ,  Kazuhiro Sonoda ,  Takashi Tsukada ,  Junji Matsushima ,  Yasushi Kimura ,  Satoru Kikuchi

IPC分类号： H01F41/02 ,  H01F1/01

CPC分类号： C22C38/005 ,  H01F1/0577 ,  H01F41/0273

摘要： A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of C, which is at least one of rare earth elements including Y, 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein it is in the shape of a ring having an outer diameter of 10-100 mm, an inner diameter of 8-96 mm, and a height of 10-70 mm, with a plurality of magnetic poles axiafly extending on an outer circumferential surface. The distribution of a surface magnetic flux density B0 on magnetic poles in an axial direction of the ring magnet is in a range of 92.5% or more of the maximum of B0.

摘要翻译： 一种烧结永久磁铁，其特征在于，具有以质量计27〜33.5％的C，所述组合物为包含Y的稀土类元素，B为0.5〜2％，N：0.002〜0.15％，N：0.25％以下的至少1种 O，0.15％以下的C和0.001-0.05％的P，余量为Fe，其中，其外径为10-100mm，内径为8-96mm的环形， 高度为10-70mm，在外圆周表面上延伸有多个磁极轴。 在环形磁体的轴向上的磁极上的表面磁通密度B <0> 0 的分布在B 的最大值的92.5％以上的范围内， 。

公开(公告)号：US5858124A

公开(公告)日：1999-01-12

申请号：US740491

申请日：1996-10-30

申请人： Minoru Endo ,  Mitsuaki Mochizuki ,  Nobuhiko Fujimori

发明人： Minoru Endo ,  Mitsuaki Mochizuki ,  Nobuhiko Fujimori

IPC分类号： H01F1/055 ,  H01F1/057

CPC分类号： H01F1/0558 ,  H01F1/0557 ,  H01F1/0576 ,  H01F1/0577 ,  H01F1/0578

摘要： A high-resistance rare earth magnet having a metal structure in which a rare earth magnet phase is dispersed throughout a compound phase comprising at least one compound selected from the group consisting of fluorides and oxides of Li, Na, Mg, Ca, Ba and Sr. The fluorides and oxides are effective for increasing the electrical resistance of a rare earth magnet to a level sufficient for practical use while maintaining high magnetic properties of the magnet.

摘要翻译： 一种具有金属结构的高电阻稀土磁体，其中稀土磁体相分散在包含至少一种选自氟化物和Li，Na，Mg，Ca，Ba和Sr的氧化物的化合物相中的化合物相 氟化物和氧化物有效地将稀土磁体的电阻提高到足够实用的水平，同时保持磁体的高磁性能。

公开(公告)号：US06447621B1

公开(公告)日：2002-09-10

申请号：US09448832

申请日：1999-11-24

申请人： Hisato Tokoro ,  Nobuhiko Fujimori

发明人： Hisato Tokoro ,  Nobuhiko Fujimori

IPC分类号： H01F1057

CPC分类号： H01F1/0573 ,  H01F1/0577

摘要： An R—T—B rare earth sintered magnet containing an R2T14B-type intermetallic compound as a main phase and thus having improved squareness ratio is produced by carrying out a reduction and diffusion method comprising the steps of (a) mixing oxide powder of at least one rare earth element R, T-containing powder, wherein T is Fe or Fe and Co, B-containing powder, and a reducing agent such as Ca, (b) heating the resultant mixture at 900-1350° C. in a non-oxidizing atmosphere, (c) removing reaction by-products from the resultant reaction product by washing, and (d) carrying out a heat treatment for Ca removal by heating the resultant R—T—B rare earth alloy powder at 900-1200° C. in vacuum at 1 Torr or less, followed by pulverization of the resultant alloy powder bulk, molding, sintering in vacuum, heat treatment, and surface treatment. The alloy powder bulk obtained by the heat treatment for Ca removal is preferably pulverized after removal of its surface layer.

摘要翻译： 通过进行还原扩散法制备含有R2T14B型金属间化合物作为主相，因此具有改善的矩形比的RTB稀土烧结磁体，其包括以下步骤：（a）将至少一种稀土元素的氧化物粉末 R，含T的粉末，其中T是Fe或Fe，Co，B的粉末和还原剂如Ca，（b）在900-1350℃下在非氧化气氛中加热所得混合物， （c）通过洗涤从所得反应产物中除去反应副产物，和（d）通过在1000-2200℃下以1乇的真空加热得到的RTB稀土合金粉末进行Ca去除热处理，或 然后粉碎所得合金粉体，成型，真空烧结，热处理和表面处理。 优选通过除去Ca去除热处理而得到的合金粉体，除去表面层后，进行粉碎。