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11. 发明专利

JP2000286118A MANUFACTURE OF SINTERED MAGNET 失效
公开(公告)号：JP2000286118A
公开(公告)日：2000-10-13
申请号：JP9374399
申请日：1999-03-31
申请人： TDK CORP
发明人： KATO EIJI , ISHIZAKA TSUTOMU , FUKUNO AKIRA , NAKAGAWA JUN
IPC分类号： H01F1/053 , B22F3/00 , C22C33/02 , C22C38/00 , H01F1/057 , H01F1/08
摘要： PROBLEM TO BE SOLVED: To stably provide an Nd2Fe14M sintered magnet having high magnetic characteristics. SOLUTION: A method for manufacturing a sintered magnet, containing R (at least one kind of rare-earth element including Y), T (Fe or Fe and Co), and B includes a process for molding a mixture of the powder of a first alloy, a second alloy, and a third alloy and sintering the molded product. The first alloy contains 26-29 wt.% R, 0.8-1.08 wt.% B, and the balance T and the second alloy contains 28 wt.% or larger R, 1.1-1.5 wt.% B, and the balance T. The third alloy contains 30 wt.% R, 0.5 wt.% B or smaller, and T as the balance.

12. 发明专利

JP2000286117A MAGNET, ITS MANUFACTURE, AND BONDED MAGNET 失效
公开(公告)号：JP2000286117A
公开(公告)日：2000-10-13
申请号：JP9274999
申请日：1999-03-31
申请人： TDK CORP
发明人： ISHIZAKA TSUTOMU , FUKUNO AKIRA
IPC分类号： H01F1/08 , B22F3/00 , C22C33/02 , C22C38/00 , C22C38/10 , C22C38/30 , H01F1/053 , H01F1/055
摘要： PROBLEM TO BE SOLVED: To provide a low-cost rare-earth magnet, and moreover having strong coercive force. SOLUTION: A magnet has a composition expressed by a formula, RXT1-X-Y-ZMIYMIIZ (where R and T respectively represent one of more kinds of rare-earth elements, including Y and Fe or Fe and Co; MI and MII respectively represent at least one kind of element selected from among Ti, V, Cr, Mo, and W and at least one kind of element selected from among Zr, Hf, Nb, Cu, Si, and Al; and X, Y, and Z respectively represent atomic ratios of 0.08-0.14, 0.01-0.15, and 0-0.05) and contains hexagonal and monoclinic crystals.

13. 发明专利

JPH05190311A PRODUCTION OF MAGNET AND MAGNETIC POWDER 失效
公开(公告)号：JPH05190311A
公开(公告)日：1993-07-30
申请号：JP2601792
申请日：1992-01-17
申请人： TDK CORP
发明人： FUKUNO AKIRA , ISHIZAKA TSUTOMU , YONEYAMA TETSUTO
IPC分类号： B22F9/04 , C22C38/00 , C23C8/26 , H01F1/053 , H01F1/059 , H01F1/08 , H01F41/02
摘要： PURPOSE:To provide a magnet which allows high coercive force and stability by holding particles in nonaqueous solvent or non-oxidizing atmosphere during a finely powdering process, a coating process and the process between such processes. CONSTITUTION:Magnet constituted of the following is manufactured; 5-15atom% of R (R is an element of one or more kinds selected from rare earth elements and that contains Sm as an essential element.), 0.5-25atom% of N and T (T is Fe or Fe and Co.). The method has roughly powdering process which roughly powders mother alloy which contains the R and T so as to provide alloy particles, nitriding process which finely powders nitride particles so as to provide magnetic grains and coating process with forms non-magnetic coat on the surface of the magnet grains. The finely powdering process and the coating process are continually performed in nonaqueous solvent. Thus, magnetic particles which allow high coercive force and low coercive force deterioration in the lapse of time are provided.

14. 发明专利

JPH04338604A METALLIC BONDING MAGNET AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04338604A
公开(公告)日：1992-11-25
申请号：JP13964191
申请日：1991-05-15
申请人： TDK CORP
发明人： FUKUNO AKIRA , ISHIZAKA TSUTOMU , YONEYAMA TETSUTO
IPC分类号： H01F1/053 , C22C38/00 , H01F1/059 , H01F1/08
摘要： PURPOSE:To get high coercive force by forming a mixture part, which contains a magnetic particles constituent element and a binder constituent element, around the magnetic particle of specified composition. CONSTITUTION:Magnetic powder is constituted of magnetic particles which contain 5-15atom% R and 0.5-25atom% N and T for the rest. But, R is one or more kinds of elements selected from rare earth elements, and contains Sm as an essential element. Moreover, T is Fe or Fe and Co. And a mixture part, which contains elements constituting magnetic particles and elements constituting binders, exists around the magnetic particle constituting the magnetic powder. And the magnetic powder constituted of magnetic particles containing R, T, and N and the powder of binders are mixed, and then it is molded and further is heat-treated at a temperature below 550 deg.C. Hereby, the surface defects of the magnetic particle, which becomes the nuclei of reverse magnetic vanishes, and high coercive force can be achieved.

15. 发明专利

JPH04260302A MAGNETIC POWDER AND ITS MANUFACTURE AND BONDED MAGNET 失效
公开(公告)号：JPH04260302A
公开(公告)日：1992-09-16
申请号：JP4246591
申请日：1991-02-14
申请人： TDK CORP
发明人： YONEYAMA TETSUTO , ISHIZAKA TSUTOMU , FUKUNO AKIRA
IPC分类号： H01F1/053 , C22C38/00 , H01F1/059 , H01F1/06 , H01F1/08
摘要： PURPOSE:To obtain a product of superior magnetic characteristics and excellent thermal stability, by constituting it of a specified amount of Sm, M (M=Zr, Hf, etc.), N, Fe and Co. CONSTITUTION:A plurality of crystal grains whose average diameter is smaller than or equal to 1mum are formed, which contain Sm of 5-15at%, M (M=Zr, Hf, etc.) of 0-10at%, and N of 0.5-25at%. The residual part is constituted of Fe or Fe and Co. Firstly, alloy particles which contain Fe and Sm and have R2T17 based crystal structure are heat-treated in a hydrogen atmosphere, where R shows rare earth metal elements and T shows Fe and Co. Secondly, by heat treatment in a reduced pressure atmosphere, hydrogen is discharged, and R2T17 based fine crystal grains are formed. Further heat treatment is performed in nitrogen atmosphere. Thereby a product of superior magnetic characteristics and excellent thermal stablity can be obtained.

16. 发明专利

JP2011211056A Rare earth sintered magnet, motor, and automobile 审中-公开
标题翻译：稀土烧结磁铁，电机和汽车
公开(公告)号：JP2011211056A
公开(公告)日：2011-10-20
申请号：JP2010078710
申请日：2010-03-30
申请人： Tdk Corp , Tdk株式会社
发明人： BABA FUMITAKA , TANAKA SATORU , IWASAKI MAKOTO , ISHIZAKA TSUTOMU
IPC分类号： H01F1/08 , H01F1/053 , H02K1/27
摘要： PROBLEM TO BE SOLVED: To provide a rare earth sintered magnet excellent in residual magnetic flux density and coercive force, especially in the coercive force, and having a high squareness ratio, and also to provide a motor and automobile using the rare earth sintered magnet.SOLUTION: A rare earth sintered magnet 10 is equipped with a group of main phase particles 2 of an R-T-B rare earth magnet, each of which has a core 4 and a shell 6 covering the core 4, wherein R contains a heavy rare earth element and a light rare earth element, and a heavy rare earth Cu compound and a light rare earth Cu compound exist on a two-particle boundary in the main phase particle 2 group. In the rare earth sintered magnet 10, a mass ratio of the heavy rare earth compound to the right rare earth Cu compound on the two-particle boundary of a position of 0.3 mm depth from the surface of the rare earth sintered magnet 10, is equal to or less than five times, the mass ratio of the heavy rare earth compound to the light rare earth Cu compound on the two-particle boundary of a position of 1.5 mm depth from the surface of the rare earth sintered magnet 10.
摘要翻译：要解决的问题：为了提供残留磁通密度和矫顽力，特别是矫顽力，矫顽力优异，矩形比高的稀土类烧结磁体，并且还提供使用稀土类烧结磁体的电机和汽车。解决方案：稀土烧结磁体10配备有一组RTB稀土磁体的主相颗粒2，每组具有芯4和覆盖芯4的壳6，其中R含有重稀土元素，主稀土元素和重稀土Cu化合物和轻稀土Cu化合物存在于主相颗粒2组的双粒子边界上。在稀土类烧结磁体10中，与稀土类烧结磁体10的表面相距0.3mm的双粒子界面上的重稀土类化合物与右侧稀土类Cu化合物的质量比相等在稀土类烧结磁体10的表面1.5mm的位置的二粒子边界上的重稀土类化合物与轻质稀土类Cu化合物的质量比为5〜5倍以下。

17. 发明专利

JP2007039787A Method for producing raw material powder for rare earth-sintered magnet, and method for producing rare earth-sintered magnet 审中-公开
标题翻译：用于生产用于稀土烧结磁体的原料粉末的方法和用于生产稀土烧结磁体的方法
公开(公告)号：JP2007039787A
公开(公告)日：2007-02-15
申请号：JP2006050002
申请日：2006-02-27
申请人： Tdk Corp , Tdk株式会社
发明人： BABA FUMITAKA , ENOKIDO YASUSHI , ISHIZAKA TSUTOMU , MASUDA TAKESHI
IPC分类号： B22F3/00 , B22F1/00 , B22F3/02 , C22C19/07 , C22C38/00 , H01F1/053 , H01F1/08 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To produce a rare earth-sintered magnet having excellent magnetic properties using granules having excellent fluidity and capable of improving the dimensional precision of a molding and improving productivity. SOLUTION: The raw material powder of a rare earth-sintered magnet and metallic soap such as a stearic acid base lubricant or the like are pulverized to obtain pulverized powder. An organic liquid is added to the pulverized powder to obtain a mixture. Using the mixture, granules to which the pulverized powder is stuck by the organic liquid are produced, so as to obtain raw material powder for the rare earth-sintered magnet. The granules as the raw material powder for the rare earth-sintered magnet are charged to a die cavity, a magnetic field is applied to the granules, and also, molding is performed under pressure to obtain a molding. The molding is sintered, so as to obtain the rare earth-sintered magnet. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：使用具有优异流动性的颗粒制造具有优异磁性的稀土烧结磁体，能够提高成型的尺寸精度并提高生产率。解决方案：将稀土烧结磁体的原料粉末和硬脂酸基润滑剂等金属皂粉碎，得到粉碎粉末。向粉碎粉末中加入有机液体，得到混合物。使用该混合物，制造粉碎粉末被有机液体粘贴的颗粒，以获得稀土烧结磁体的原料粉末。作为稀土烧结磁体的原料粉末的颗粒被加入到模腔中，对颗粒施加磁场，并且在压力下进行模塑以获得模塑。将该成型体烧结，以获得稀土烧结磁体。版权所有（C）2007，JPO＆INPIT

18. 发明专利

JP2006310797A Process for producing rare earth permanent magnet 有权
标题翻译：生产稀土永磁体的方法
公开(公告)号：JP2006310797A
公开(公告)日：2006-11-09
申请号：JP2006070217
申请日：2006-03-15
申请人： Tdk Corp , Tdk株式会社
发明人： ISHIZAKA TSUTOMU , NISHIZAWA KOICHI , SAKAMOTO TOKUJI
IPC分类号： H01F41/02 , B22F1/02 , B22F3/00 , B22F3/02 , B22F9/04 , C22C33/02 , C22C38/00 , H01F1/053
摘要： PROBLEM TO BE SOLVED: To provide a process for producing a rare earth permanent magnet in which even a smaller quantity of lubricant added can exhibit the effect as a lubricant sufficiently. SOLUTION: The process for producing an R-T-B (R: one kind or more than one kind of rare earth elements, T: Co and/or Fe, B: boron) based rare earth permanent magnet comprises a step for pulverizing a material alloy roughly, a step for adding first lubricant to roughly pulverized powder produced in the rough pulverization step, a step for pulverizing the roughly pulverized powder added with lubricant finely, a step for adding second lubricant to finely pulverized powder produced in the fine pulverization step and stirring it in a temperature zone between 30°C and Tm (Tm is the lowest temperature of melting points of first and second lubricants), a step for shaping the finely pulverized powder passed through the mixing step in a magnetic field, and a step for sintering the compact obtained in the shaping step. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供稀土永磁体的制造方法，即使添加的少量润滑剂也能充分发挥作为润滑剂的效果。解决方案：用于生产RTB（R：一种或多于一种稀土元素，T：Co和/或Fe，B：硼）的稀土永磁体的方法包括用于粉碎材料的步骤合金粗大化的步骤，在粗粉碎工序中制造的粗粉碎粉末中添加第一润滑剂的步骤，将微细添加润滑剂的粗粉碎粉末粉碎的步骤，向细粉碎工序中制造的细粉碎粉末添加第二润滑剂的工序;以及在30℃与Tm之间的温度区域（Tm是第一和第二润滑剂的熔点的最低温度）进行搅拌，在磁场中使通过混合步骤的细粉碎粉末成形的工序，烧结在成形步骤中获得的压块。版权所有（C）2007，JPO＆INPIT

19. 发明专利

JP2006278990A Rare earth permanent magnet 有权
标题翻译：稀土永磁体
公开(公告)号：JP2006278990A
公开(公告)日：2006-10-12
申请号：JP2005100105
申请日：2005-03-30
申请人： Tdk Corp , Tdk株式会社
发明人： NAKANE MAKOTO , KATO EIJI , ISHIZAKA TSUTOMU , OJI NAOTO
IPC分类号： H01F1/053 , B22F3/00 , C22C33/02 , C22C38/00 , H01F1/08
摘要： PROBLEM TO BE SOLVED: To provide a rare earth permanent magnet that has good magnetic properties such as residual magnetic flux density and coercive force, suppresses particle growth in a sintering process, and extends a range of sintering temperature. SOLUTION: This permanent magnet contains compositions such as Tb: 0-10 mass% (not including "0"), R: 25 mass%-35 mass% (R comprises two kinds or more selected from rare earth elements and contains at least the above Tb), Co: 0-2 mass%, B: 0.5 mass%-4.5 mass%, one kind or two kinds or more selected from Cu and Al: 0.02 mass%-0.5 mass%, Zr: 0.03 mass%-0.25 mass%, Zn: 0.02 mass%-0.05 mass%, O:0.03 mass%-0.2 mass% and Fe and inevitable impurity:remnant. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有良好的磁特性（例如剩余磁通密度和矫顽力）的稀土永磁体，抑制烧结过程中的颗粒生长，并延伸一定范围的烧结温度。该永久磁铁含有Tb：0〜10质量％（不包括“0”），R：25质量％-35质量％（R包含从稀土元素中选出的2种以上，含有至少上述Tb），Co：0-2质量％，B：0.5质量％-4.5质量％，选自Cu和Al中的一种或两种以上：0.02质量％-0.5质量％，Zr：0.03质量％％-0.25质量％，Zn：0.02质量％-0.05质量％，O：0.03质量％-0.2质量％，Fe和不可避免的杂质：残留物。版权所有（C）2007，JPO＆INPIT

20. 发明专利

JP2006237212A Rare earth sintered magnet 审中-公开
标题翻译：稀土烧结磁铁
公开(公告)号：JP2006237212A
公开(公告)日：2006-09-07
申请号：JP2005048588
申请日：2005-02-24
申请人： Tdk Corp , Tdk株式会社
发明人： ISHIZAKA TSUTOMU , SAKAMOTO TOKUJI , ENOKIDO YASUSHI , MASUDA TAKESHI
IPC分类号： H01F1/053 , C22C19/07 , C22C38/00 , H01F1/08
摘要： PROBLEM TO BE SOLVED: To provide a rare earth sintered magnet of high residual magnetic flux density (Br) without degrading coercive force (HcJ) and mechanical strength. SOLUTION: The rare earth sintered magnet consists of a sintered body whose carbon content is 500-1,500 ppm with cv value of carbon content on a fracture surface of 200 or less. The cv value of carbon content is preferably 150 or less. The rare earth sintered magnet is preferably an R-Fe-B sintered magnet containing R 2 Fe 14 B compound (R is one or more kinds among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu). The R-Fe-B sintered magnet like this has such characteristics as flexural strength is 350 MPa or higher, residual magnetic flux density (Br) is 13 kG or higher, and coercive force (HcJ) is 18 kOe or higher. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供高残留磁通密度（Br）的稀土烧结磁体，而不降低矫顽力（HcJ）和机械强度。解决方案：稀土烧结磁体由碳含量为500-1,500ppm，断裂面上碳含量cv值为200以下的烧结体构成。碳含量的cv值优选为150以下。稀土类烧结磁体优选为含有R 2 SBB 14 B化合物的R-Fe-B烧结磁体（R是Y，La，Ce中的一种或多种， Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb和Lu）。这样的R-Fe-B烧结磁体具有弯曲强度为350MPa以上，残留磁通密度（Br）为13kG以上，矫顽力（HcJ）为18kOe以上的特性。版权所有（C）2006，JPO＆NCIPI

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