公开(公告)号：US09350203B2

公开(公告)日：2016-05-24

申请号：US13637247

申请日：2011-03-30

Applicant: Fumitaka Baba ,  Satoshi Tanaka ,  Makoto Iwasaki ,  Chikara Ishizaka

Inventor： Fumitaka Baba ,  Satoshi Tanaka ,  Makoto Iwasaki ,  Chikara Ishizaka

IPC: H01F7/02 ,  H02K1/02 ,  C22C38/00 ,  C22C38/14 ,  H01F1/057 ,  H01F41/02 ,  H02K21/16

CPC classification number: H02K1/02 ,  C22C38/005 ,  C22C38/14 ,  H01F1/0577 ,  H01F41/0293 ,  H02K21/16

Abstract: Provided is a rare earth sintered magnet 10 comprising a group of main phase grains 2 each composed of an R-T-B-based rare earth magnet comprising a core 4 and a shell 6 covering the core 4, wherein a thickness of the shell 6 is 500 nm or less, R includes a light rare earth element and a heavy rare earth element, and a Zr compound 8 is present in a grain boundary phase 7 of the group of main phase grains 2 and/or the shell 6. Also provided are a motor comprising the rare earth sintered magnet 10 and an automobile comprising the motor.

Abstract translation: 本发明提供一种稀土类烧结磁体10，其包含一组主相颗粒2，每个主相颗粒2由包括芯4的RTB基稀土磁体和覆盖芯4的壳体6组成，其中壳体6的厚度为500nm或 较少的R包括轻稀土元素和重稀土元素，并且Zr化合物8存在于主相晶粒2和/或壳6组的晶界相7中。还提供了一种马达，其包括 稀土烧结磁体10和包含电动机的汽车。

公开(公告)号：US08157927B2

公开(公告)日：2012-04-17

申请号：US12646593

申请日：2009-12-23

Applicant: Yasushi Enokido ,  Chikara Ishizaka ,  Gouichi Nishizawa

Inventor： Yasushi Enokido ,  Chikara Ishizaka ,  Gouichi Nishizawa

IPC: H01F1/057

CPC classification number: H01F41/0266 ,  H01F1/057 ,  H01F1/0577

Abstract: It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material alloy more fine and making the size distribution more narrow. The present invention provides a raw material alloy for an R-T-B system sintered magnet containing grains of an R2T14B compound, wherein a P and/or S content is between 100 and 950 ppm. This raw material alloy preferably has a composition comprising 25 to 35% by weight of R, 0.5 to 4% by weight of B, 0.02 to 0.6% of one or both of Al and Cu, 5% by weight or less of Co, and the balance of Fe.

Abstract translation: 本发明的目的是通过使通过带状铸造制备的原料合金的晶体微观结构更均匀地获得高矫顽RTB系烧结磁体，从而使由这种原料合金获得的粉碎粉末更细， 尺寸分布更窄。 本发明提供了含有R2T14B化合物颗粒的R-T-B系烧结磁体的原料合金，其中P和/或S含量为100〜950ppm。 该原料合金优选具有25〜35重量％的R，0.5〜4重量％的B，0.02〜0.6重量％的Al和Cu中的一种或两种，5重量％以下的Co，以及 余铁。

公开(公告)号：US20110274898A1

公开(公告)日：2011-11-10

申请号：US13103869

申请日：2011-05-09

Applicant: Tetsuya Hidaka ,  Chikara Ishizaka

Inventor： Tetsuya Hidaka ,  Chikara Ishizaka

IPC: B32B3/10

CPC classification number: H01F1/0571 ,  B22F2009/041 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0441 ,  H01F1/0577 ,  H01F41/0273 ,  Y10T428/24917 ,  B22F3/02 ,  B22F2202/05 ,  B22F9/04 ,  B22F3/10

Abstract: The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T: one or more transition metal elements essentially comprising Fe, or Fe and Co) and B (boron) as the main components, wherein a starting alloy prepared by strip casting is pulverized to a given particle size to form a fine powder, where the starting alloy comprises discolored deposit 1 on the surface and the area ratio of the discolored deposit 1 is 1.5% or less, the resulting fine powder is compacted in a magnetic field to prepare a compact, and the compact is sintered.

Abstract translation: 本发明提供一种制造烧结磁体的方法，即使在磁体具有低R成分的情况下也能够具有足够的烧结密度。 该方法用于制造包含R（R：一种或多种稀土元素）的T（T：一种或多种过渡金属元素，主要包含Fe或Fe和Co）和B（硼）作为主要成分的烧结磁体 其中通过带状铸造制备的起始合金粉碎至给定的粒径以形成细粉末，其中起始合金包括表面上的变色沉积物1，并且变色沉积物1的面积比为1.5％或更小，所得 细粉末在磁场中压实以制备成型体，并且将该压坯烧结。

公开(公告)号：US08123832B2

公开(公告)日：2012-02-28

申请号：US11814105

申请日：2006-03-08

Applicant: Eiji Kato ,  Chikara Ishizaka

Inventor： Eiji Kato ,  Chikara Ishizaka

IPC: B22F1/00 ,  B22F3/00 ,  C22C1/00

CPC classification number: H01F1/0577 ,  B22F2999/00 ,  C22C1/0441 ,  C22C33/0278 ,  C22C38/005 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F41/0293 ,  B22F2207/01

Abstract: An R-T-B system sintered magnet is provided which achieves both a high residual magnetic flux density and a high coercive force. The R-T-B system sintered magnet comprises main-phase grains 1 each having a core-shell structure comprising an inner shell part 2 and an outer shell part 3 surrounding the inner shell part 2, wherein the concentration of the heavy rare earth element in the inner shell part 2 is lower by 10% or more than the concentration of the heavy rare earth element in the periphery of the outer shell part 3, and (L/r)ave falls within a range from 0.03 to 0.40 in the main-phase grains 1 each comprising the inner shell part 2 and the outer shell part 3, wherein L represents the shortest distance from the periphery of the main phase grain 1 to the inner shell part 2, r represents the equivalent diameter of the main phase grain 1, and (L/r)ave represents the average value of L/r for the main-phase grains 1 present in the sintered body and having the core-shell structure.

Abstract translation: 提供了一种R-T-B系烧结磁体，其实现了高残留磁通密度和高矫顽力。 RTB系烧结磁体包括主相颗粒1，每个主相颗粒1具有包含内壳部分2的核 - 壳结构和围绕内壳部分2的外壳部分3，其中内壳中的重稀土元素的浓度 部分2比外壳部3周边的重稀土元素的浓度低10％以上，并且（L / r）ave在主相晶粒1的0.03〜0.40的范围内 每个包括内壳部分2和外壳部分3，其中L表示从主相晶粒1的周边到内壳部分2的最短距离，r表示主相晶粒1的等效直径，（ L / r）ave表示存在于烧结体中并具有核 - 壳结构的主晶粒1的L / r的平均值。

公开(公告)号：US07858023B2

公开(公告)日：2010-12-28

申请号：US11569767

申请日：2005-06-28

Applicant: Yasushi Enokido ,  Fumitaka Baba ,  Chikara Ishizaka ,  Takeshi Masuda

Inventor： Yasushi Enokido ,  Fumitaka Baba ,  Chikara Ishizaka ,  Takeshi Masuda

IPC: B22F1/00 ,  B22F1/02

CPC classification number: C22C1/0441 ,  B01J2/10 ,  B01J2/28 ,  B22F1/0059 ,  B22F1/0096 ,  B22F3/087 ,  B22F3/093 ,  B22F5/003 ,  B22F9/04 ,  B22F2001/0066 ,  B22F2009/041 ,  B22F2009/042 ,  B22F2998/00 ,  B22F2998/10 ,  C22C19/07 ,  C22C33/02 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0273 ,  B22F3/02 ,  B22F2202/05 ,  B22F1/0074 ,  B22F2201/20 ,  B22F2202/01 ,  B22F3/10

Abstract: A method for producing a rare earth sintered magnet uses granules having an excellent fluidity to improve the dimensional accuracy and production of a compact formed of the granules without significant property losses. The granules are formed by adding an organic liquid to primary alloy particles having a predetermined composition to produce granules having the primary alloy particles adhered together by the organic liquid. Preferably, from 1.5 to 15.0% by weight of the organic liquid is added to the primary alloy particles.

Abstract translation: 稀土类烧结磁体的制造方法使用具有优异的流动性的颗粒，从而提高尺寸精度，并且制造由颗粒形成的压块，而没有显着的损失。 通过将有机液体加入到具有预定组成的一次合金颗粒中以形成具有通过有机液体粘附在一起的一次合金颗粒的颗粒而形成颗粒。 优选地，将1.5至15.0重量％的有机液体加入到初级合金颗粒中。

公开(公告)号：US20100111746A1

公开(公告)日：2010-05-06

申请号：US12646593

申请日：2009-12-23

Applicant: Yasushi Enokido ,  Chikara Ishizaka ,  Gouichi Nishizawa

Inventor： Yasushi Enokido ,  Chikara Ishizaka ,  Gouichi Nishizawa

IPC: B22F1/00 ,  B22F3/12

CPC classification number: H01F41/0266 ,  H01F1/057 ,  H01F1/0577

Abstract: It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material alloy more fine and making the size distribution more narrow. The present invention provides a raw material alloy for an R-T-B system sintered magnet containing grains of an R2T14B compound, wherein a P and/or S content is between 100 and 950 ppm. This raw material alloy preferably has a composition comprising 25 to 35% by weight of R, 0.5 to 4% by weight of B, 0.02 to 0.6% of one or both of Al and Cu, 5% by weight or less of Co, and the balance of Fe.

Abstract translation: 本发明的目的是通过使通过带状铸造制备的原料合金的晶体微观结构更均匀地获得高矫顽RTB系烧结磁体，从而使由这种原料合金获得的粉碎粉末更细， 尺寸分布更窄。 本发明提供了含有R2T14B化合物颗粒的R-T-B系烧结磁体的原料合金，其中P和/或S含量为100〜950ppm。 该原料合金优选具有25〜35重量％的R，0.5〜4重量％的B，0.02〜0.6重量％的Al和Cu中的一种或两种，5重量％以下的Co，以及 余铁。

公开(公告)号：US20100040501A1

公开(公告)日：2010-02-18

申请号：US12572025

申请日：2009-10-01

Applicant: Eiji KATO ,  Chikara ISHIZAKA

Inventor： Eiji KATO ,  Chikara ISHIZAKA

IPC: H01F41/02 ,  B22F1/00 ,  B22F3/12

CPC classification number: C22C38/005 ,  H01F1/0577

Abstract: An R-T-B system rare earth permanent magnet, which comprises at least main phase grains consisting essentially of R2T14B compounds and a grain boundary phase having a higher amount of R than the above described main phase grains, and which satisfies the following formulas: AVE(X)/Y=0.8 to 1.0; and (X/Y)max/(X/Y)min=2.0 to 13.0, wherein X represents (the weight ratio of heavy rare earth elements)/(the weight ratio of all the rare earth elements) for a given number of the above described main phase grains in the above described sintered body; Y represents (the weight ratio of heavy rare earth elements)/(the weight ratio of all the rare earth elements) for the sintered body as a whole; AVE(X) represents the mean value of X obtained for the given number of the main phase grains; (X/Y)min represents the minimum value of (X/Y) obtained for the given number of the main phase grains; and (X/Y)max represents the maximum value of (X/Y) obtained for the given number of the main phase grains.

Abstract translation: 一种RTB系稀土永磁体，其至少包含主要由R2T14B化合物组成的主相晶粒和具有比上述主相晶粒高的R的晶界相，其满足下式：AVE（X） /Y=0.8〜1.0; 和（X / Y）max /（X / Y）min = 2.0〜13.0，其中X表示（重稀土元素的重量比）/（所有稀土元素的重量比） 上述烧结体中的主相晶粒; Y表示（重稀土元素的重量比）/（所有稀土元素的重量比）作为整体烧结体; AVE（X）表示给定数量的主相晶粒获得的X的平均值; （X / Y）min表示给定数量的主相晶粒获得的（X / Y）的最小值; 和（X / Y）max表示对于给定数量的主相晶粒获得的（X / Y）的最大值。

公开(公告)号：US07618497B2

公开(公告)日：2009-11-17

申请号：US10541964

申请日：2004-06-24

Applicant: Eiji Kato ,  Chikara Ishizaka

Inventor： Eiji Kato ,  Chikara Ishizaka

IPC: H01F1/057

CPC classification number: C22C38/005 ,  H01F1/0577

Abstract: An R-T-B system rare earth permanent magnet, which comprises main phase grains consisting of R2T14B compounds and a grain boundary phase having a higher amount of R than the above described main phase grains, and which satisfies AVE(X)/Y=0.8 to 1.0; and (X/Y)max/(X/Y)min=2.0 to 13.0, wherein X represents (weight ratio of heavy rare earth elements)/(the weight ratio of all rare earth elements) for a given number of the above described main phase grains Y represents (weight ratio of heavy rare earth elements)/(weight ratio of all rare earth elements) for the sintered body as a whole; AVE(X) represents the mean value of X obtained for the given number of main phase grains; (X/Y)min represents the minimum value of (X/Y) obtained for the given number of main phase grains; and (X/Y)max represents the maximum value of (X/Y) obtained for the given number of main phase grains.

Abstract translation: 一种R-T-B系稀土永磁体，其包含由R2T14B化合物构成的主相晶粒和比上述主相晶粒高R量的晶界相，其满足AVE（X）/ Y=0.8〜1.0; 和（X / Y）max /（X / Y）min = 2.0〜13.0，其中X表示（重稀土元素的重量比）/（所有稀土元素的重量比） 主相晶粒Y代表烧结体整体的（重稀土元素的重量比）/（所有稀土元素的重量比） AVE（X）表示给定数量的主相晶粒获得的X的平均值; （X / Y）min表示给定数量的主相晶粒获得的（X / Y）的最小值; 和（X / Y）max表示对于给定数量的主相晶粒获得的（X / Y）的最大值。

公开(公告)号：US07416613B2

公开(公告)日：2008-08-26

申请号：US11040494

申请日：2005-01-21

Applicant: Tsutomu Chou ,  Gouichi Nishizawa ,  Masatoshi Hatakeyama ,  Chikara Ishizaka

Inventor： Tsutomu Chou ,  Gouichi Nishizawa ,  Masatoshi Hatakeyama ,  Chikara Ishizaka

IPC: H01F1/04 ,  H01F1/053

CPC classification number: H01F1/0536 ,  H01F1/0577 ,  H01F41/0273

Abstract: A method for compacting a magnetic powder in a magnetic field comprising steps of filling a die with a magnetic powder, applying a pulsed magnetic field to the magnetic powder in the die to orientate the powder, and compressing the magnetic powder, wherein the pulsed magnetic field is applied twice or more when density ρ of a compacted body of said magnetic powder satisfies the relationship ρ=α×H0.5+β(α=0.63 and β=1 to 2), where H is intensity (T) of the applied magnetic field.

Abstract translation: 一种用于在磁场中压制磁粉的方法，包括以下步骤：用磁粉填充模具，将脉冲磁场施加到模具中的磁粉以使粉末定向并压缩磁粉，其中脉冲磁场 施加两次或更多次，所述磁粉的压实体的密度rho满足关系rho = alphaxH0.5 +β（α= 0.63和β= 1至2），其中H是强度（T ）所施加的磁场。

公开(公告)号：US07208056B2

公开(公告)日：2007-04-24

申请号：US11048620

申请日：2005-01-31

Applicant: Makoto Iwasaki ,  Chikara Ishizaka ,  Taku Takeishi

Inventor： Makoto Iwasaki ,  Chikara Ishizaka ,  Taku Takeishi

IPC: H01F1/057

CPC classification number: C22C38/005 ,  B22F2009/044 ,  B22F2998/10 ,  C22C33/0278 ,  C22C38/06 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/026 ,  B22F9/023 ,  B22F9/04 ,  B22F3/02 ,  B22F3/20

Abstract: An R-T-B system rare earth sintered magnet having a high mechanical strength and excellent corrosion resistance is provided. The R-T-B system rare earth sintered magnet of the present invention comprises a sintered body comprising a main phase consisting of an R2T14B phase where R represents one or more rare earth elements and T represents one or more transition metal elements essentially containing Fe, or Fe and Co, and a grain boundary phase containing a higher amount of R than the above described main phase, wherein the surface of the above described sintered body is partially covered with a carbon compound layer. In the R-T-B system rare earth sintered magnet of the present invention, the area ratio of the partial surface of the above described sintered body covered with the above described carbon compound layer to the entire surface thereof is preferably between 10% and 90%.

Abstract translation: 提供了具有高机械强度和优异的耐腐蚀性的R-T-B系稀土烧结磁体。 本发明的RTB系稀土烧结磁体包括烧结体，该烧结体包括由R 2 T 14 B相构成的主相，其中R表示一种或多种稀土 元素和T代表基本上含有Fe或Fe和Co的一种或多种过渡金属元素，以及含有比上述主相含量更高的R的晶界相，其中上述烧结体的表面被部分地覆盖 碳化合物层。 在本发明的R-T-B系稀土烧结磁体中，上述碳化合物层覆盖的上述烧结体的局部表面与其整个表面的面积比优选为10％〜90％。