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1. 发明授权

US08123832B2 R-T-B system sintered magnet 有权
标题翻译： R-T-B系烧结磁体
公开(公告)号：US08123832B2
公开(公告)日：2012-02-28
申请号：US11814105
申请日：2006-03-08
申请人： Eiji Kato , Chikara Ishizaka
发明人： Eiji Kato , Chikara Ishizaka
IPC分类号： B22F1/00 , B22F3/00 , C22C1/00
CPC分类号： H01F1/0577 , B22F2999/00 , C22C1/0441 , C22C33/0278 , C22C38/005 , C22C38/10 , C22C38/16 , C22C2202/02 , H01F41/0293 , B22F2207/01
摘要： 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.
摘要翻译：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。

2. 发明授权

US07618497B2 R-T-B based rare earth permanent magnet and method for production thereof 有权
标题翻译： R-T-B系稀土类永久磁铁及其制造方法
公开(公告)号：US07618497B2
公开(公告)日：2009-11-17
申请号：US10541964
申请日：2004-06-24
申请人： Eiji Kato , Chikara Ishizaka
发明人： Eiji Kato , Chikara Ishizaka
IPC分类号： H01F1/057
CPC分类号： C22C38/005 , H01F1/0577
摘要： 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.
摘要翻译：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。

3. 发明申请

US20060231165A1 R-t-b based rare earth permanent magnet and method for production thereof 有权
标题翻译： R-t-b系稀土类永久磁铁及其制造方法
公开(公告)号：US20060231165A1
公开(公告)日：2006-10-19
申请号：US10541964
申请日：2004-06-24
申请人： Eiji Kato , Chikara Ishizaka
发明人： Eiji Kato , Chikara Ishizaka
IPC分类号： H01F1/057
CPC分类号： C22C38/005 , H01F1/0577
摘要： 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 the main phase grains.
摘要翻译：一种RTB系稀土永磁体，其包含由R 2 T 14 S B化合物组成的主相晶粒和具有比上述更高量的R的晶界相主相晶粒，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。

4. 发明授权

US06833036B2 Rare earth permanent magnet 有权
标题翻译：稀土永磁铁
公开(公告)号：US06833036B2
公开(公告)日：2004-12-21
申请号：US10185767
申请日：2002-06-27
申请人： Makoto Nakane , Eiji Kato , Chikara Ishizaka , Akira Fukuno
发明人： Makoto Nakane , Eiji Kato , Chikara Ishizaka , Akira Fukuno
IPC分类号： H01F1057
CPC分类号： H01F1/057 , H01F1/0577
摘要： A rare earth permanent magnet consists of 20-40 wt % of at least one rare earth element R, 0.5-4.5 wt % of boron B, 0.03-0.5 wt % of M (at least one of Al, Cu, Sn and Ga), 0.01-0.2 wt % of Bi, and the balance being at least one transition metal element T.
摘要翻译：稀土永磁体基本上由20-40重量％的至少一种稀土元素R，0.5-4.5重量％的硼B，0.03-0.5重量％的M（Al，Cu，Sn和Ga中的至少一种）组成），0.01-0.2重量％的Bi，余量为至少一种过渡金属元素T.

5. 发明申请

US20090019969A1 R-T-B SYSTEM SINTERED MAGNET 有权
标题翻译： R-T-B系统烧结磁体
公开(公告)号：US20090019969A1
公开(公告)日：2009-01-22
申请号：US11814105
申请日：2006-03-08
申请人： Eiji Kato , Chikara Ishizaka
发明人： Eiji Kato , Chikara Ishizaka
IPC分类号： B22F1/00
CPC分类号： H01F1/0577 , B22F2999/00 , C22C1/0441 , C22C33/0278 , C22C38/005 , C22C38/10 , C22C38/16 , C22C2202/02 , H01F41/0293 , B22F2207/01
摘要： 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.
摘要翻译：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。

6. 发明授权

US09350203B2 Rare earth sintered magnet, method for producing the same, motor, and automobile 有权
标题翻译：稀土烧结磁体，制造方法，电动机，汽车等
公开(公告)号：US09350203B2
公开(公告)日：2016-05-24
申请号：US13637247
申请日：2011-03-30
申请人： Fumitaka Baba , Satoshi Tanaka , Makoto Iwasaki , Chikara Ishizaka
发明人： Fumitaka Baba , Satoshi Tanaka , Makoto Iwasaki , Chikara Ishizaka
IPC分类号： H01F7/02 , H02K1/02 , C22C38/00 , C22C38/14 , H01F1/057 , H01F41/02 , H02K21/16
CPC分类号： H02K1/02 , C22C38/005 , C22C38/14 , H01F1/0577 , H01F41/0293 , H02K21/16
摘要： 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.
摘要翻译：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。

7. 发明授权

US08157927B2 Raw material alloy for R-T-B system sintered magnet, R-T-B system sintered magnet and production method thereof 有权
标题翻译： R-T-B系烧结磁体原料合金，R-T-B系烧结磁体及其制备方法
公开(公告)号：US08157927B2
公开(公告)日：2012-04-17
申请号：US12646593
申请日：2009-12-23
申请人： Yasushi Enokido , Chikara Ishizaka , Gouichi Nishizawa
发明人： Yasushi Enokido , Chikara Ishizaka , Gouichi Nishizawa
IPC分类号： H01F1/057
CPC分类号： H01F41/0266 , H01F1/057 , H01F1/0577
摘要： 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.
摘要翻译：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。

8. 发明申请

US20110274898A1 Method for Producing Sintered Magnet and alloy for sintered magnet 审中-公开
标题翻译：烧结磁铁和合金烧结磁铁的制造方法
公开(公告)号：US20110274898A1
公开(公告)日：2011-11-10
申请号：US13103869
申请日：2011-05-09
申请人： Tetsuya Hidaka , Chikara Ishizaka
发明人： Tetsuya Hidaka , Chikara Ishizaka
IPC分类号： B32B3/10
CPC分类号： H01F1/0571 , B22F2009/041 , B22F2998/10 , B22F2999/00 , C22C1/0441 , H01F1/0577 , H01F41/0273 , Y10T428/24917 , B22F3/02 , B22F2202/05 , B22F9/04 , B22F3/10
摘要： 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.
摘要翻译：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。

9. 发明授权

US07955442B2 Method for producing sintered magnet and alloy for sintered magnet 有权
标题翻译：烧结磁体制造方法及烧结磁体用合金
公开(公告)号：US07955442B2
公开(公告)日：2011-06-07
申请号：US10990333
申请日：2004-11-16
申请人： Tetsuya Hidaka , Chikara Ishizaka
发明人： Tetsuya Hidaka , Chikara Ishizaka
IPC分类号： H01F1/057
CPC分类号： H01F1/0571 , B22F2009/041 , B22F2998/10 , B22F2999/00 , C22C1/0441 , H01F1/0577 , H01F41/0273 , Y10T428/24917 , B22F3/02 , B22F2202/05 , B22F9/04 , B22F3/10
摘要： 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.
摘要翻译：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。

10. 发明授权

US07311788B2 R-T-B system rare earth permanent magnet 有权
标题翻译： R-T-B系稀土永磁铁
公开(公告)号：US07311788B2
公开(公告)日：2007-12-25
申请号：US10675230
申请日：2003-09-29
申请人： Gouichi Nishizawa , Chikara Ishizaka , Tetsuya Hidaka , Akira Fukuno , Yoshinori Fujikawa
发明人： Gouichi Nishizawa , Chikara Ishizaka , Tetsuya Hidaka , Akira Fukuno , Yoshinori Fujikawa
IPC分类号： H01F1/057
CPC分类号： C22C28/00 , C22C1/0441 , C22C30/00 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/0557 , H01F1/0577 , H01F41/0253
摘要： A sintered body with a composition consisting of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, provided that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe. This sintered body has a coefficient of variation (CV value) showing the dispersion degree of Zr of 130 or less. In addition, this sintered body has a grain boundary phase comprising a region that is rich both in at least one element selected from a group consisting of Cu, Co and R, and in Zr. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.
摘要翻译：具有25重量％至35重量％的R（其中R表示一种或多种稀土元素，条件是稀土元素包括Y），0.5重量％至4.5重量％的B组成的烧结体，0.02重量％至0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不包括0）的Co，余量实质上为Fe。该烧结体具有显示Zr的分散度为130以下的变异系数（CV值）。此外，该烧结体具有包含富含选自Cu，Co和R中的至少一种元素的区域和在Zr中的区域的晶界相。该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。

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