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91. 发明授权

US10062503B2 Manufacturing method of green compacts of rare earth alloy magnetic powder and a manufacturing method of rare earth magnet 有权
公开(公告)号：US10062503B2
公开(公告)日：2018-08-28
申请号：US14435017
申请日：2013-10-11
申请人： XIAMEN TUNGSTEN CO., LTD.
发明人： Hiroshi Nagata , Chonghu Wu
IPC分类号： H01F41/02 , B22F3/12 , H01F1/057 , C22C38/00 , C22C38/10 , B22F3/14 , B22F3/24 , H01F1/08
CPC分类号： H01F41/0266 , B22F3/14 , B22F3/24 , B22F2003/248 , B22F2999/00 , C22C38/002 , C22C38/005 , C22C38/10 , C22C2202/00 , H01F1/0576 , H01F1/0577 , H01F1/08 , B22F3/02 , B22F2201/00
摘要： The present invention discloses a manufacturing method of green compacts of rare earth alloy magnetic powder and a manufacturing method of rare earth magnet, it is a manufacturing method that pressing the rare earth alloy magnetic powder added with organic additive in a closed space filled with inert gases to manufacture the green compacts, wherein the rare earth alloy magnetic powder is compacted under magnetic field in a temperature atmosphere of 25° C.-50° C. and a relative humidity atmosphere of 10%-40%. This method is to set the temperature of the inert atmosphere in a fully closed space, inhibiting bad forming phenomenon of the magnet with low oxygen content (broken, corner-breakage, crack) after sintering, and increasing the degree of orientation, Br and (BH)max.

92. 发明申请

US20180236554A1 DIFFUSION TREATMENT DEVICE AND METHOD FOR MANUFACTURING R-T-B SYSTEM SINTERED MAGNET USING SAME 审中-公开
公开(公告)号：US20180236554A1
公开(公告)日：2018-08-23
申请号：US15754647
申请日：2016-08-19
申请人： HITACHI METALS, LTD.
发明人： Futoshi KUNIYOSHI
IPC分类号： B22F3/24 , C22C28/00 , C22C33/02 , C22C38/00 , H01F1/057 , H01F1/08 , H01F41/02 , H01F1/053
CPC分类号： B22F3/24 , B22F2999/00 , C22C19/07 , C22C28/00 , C22C33/02 , C22C38/00 , C22C38/005 , C22C38/10 , C22C38/32 , F27D3/12 , H01F1/0536 , H01F1/057 , H01F1/0577 , H01F1/08 , H01F41/02 , H01F41/0293 , C22C2202/02 , B22F2003/248 , B22F3/003
摘要： A diffusion treatment device includes: a treatment container including a cylindrical main body and first and second lids, the cylindrical main body having a treatment space which is capable of receiving sintered magnet pieces and RH diffusion sources, the first and second lids being capable of hermetically sealing first and second openings, respectively, at opposite ends of the cylindrical main body; a conveyor for conveying the treatment container by a predetermined distance in an x-axis direction while a longitudinal direction of the treatment container is located in a y-axis direction in a rectangular coordinate system xyz; a heating unit including a lower heating section provided under the treatment container and an upper heating section provided above the treatment container, and a first rotating unit for rotating the treatment container around a y-axis while the longitudinal direction of the treatment container is located in the y-axis direction.

93. 发明授权

US09968999B2 Boron doped manganese antimonide as a useful permanent magnet material 有权
公开(公告)号：US09968999B2
公开(公告)日：2018-05-15
申请号：US14516007
申请日：2014-10-16
申请人： COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
发明人： Nidhi Singh , Jiji Thomas Joseph Pulikkotil , Anurag Gupta , Kanika Anand , Ajay Dhar , Ramesh Chandra Budhani
IPC分类号： H01F41/02 , B22F3/10 , C22C12/00 , H01F1/047 , H01F1/08
CPC分类号： B22F3/10 , C22C12/00 , H01F1/047 , H01F1/08
摘要： Permanent magnets are used for several important applications, including dc electrical motors, wind turbines, hybrid automobile, and for many other applications. Modern widely used rare-earth based permanent magnet materials, such as Sm—Co and Nd—Fe—B, are generally intermetallic alloys made from rare earth elements and transition metals such as cobalt. However, the high costs of rare earth elements make the widespread use of these permanent magnets commercially unattractive. The present work focuses on producing a new permanent magnet material, with good magnetic properties, which is free from rare-earth elements and thus cost-effective. The present invention provides a process to synthesis boron doped manganese antimonide as an alternative to rare earth based permanent magnet materials. The boron doped manganese antimonide disclosed in this invention is free from rare-earth element with good magnetic properties. The material in the present study has been synthesized employing sequential combination of high energy ball milling, arc melting under argon atmosphere and again high energy ball milling followed by annealing. The annealed boron doped manganese antimonide shows improved magnetic properties as compared to manganese antimonide.

94. 发明授权

US09685267B2 Coil component 有权
公开(公告)号：US09685267B2
公开(公告)日：2017-06-20
申请号：US15132102
申请日：2016-04-18
申请人： TAIYO YUDEN CO., LTD.
发明人： Hitoshi Matsuura , Tomomi Kobayashi , Yoshikazu Okino , Hidemi Iwao , Kenichiro Nogi , Kenji Otake
IPC分类号： H01F5/00 , H01F27/28 , H01F17/00 , H01F1/047 , H01F1/08 , H01F27/255 , H01F27/29
CPC分类号： H01F27/2823 , H01F1/047 , H01F1/08 , H01F17/0033 , H01F27/255 , H01F27/2804 , H01F27/29 , H01F2027/2809
摘要： A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and contains substantially no glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

95. 发明申请

US20170140855A1 R-T-B BASED SINTERED MAGNET 审中-公开
公开(公告)号：US20170140855A1
公开(公告)日：2017-05-18
申请号：US15344245
申请日：2016-11-04
申请人： TDK CORPORATION
发明人： Atsushi TADA
IPC分类号： H01F1/053 , C22C38/16 , C22C38/10 , B22F3/16 , C21D3/06 , C21D1/74 , B22F9/04 , H01F1/08 , C22C38/00
CPC分类号： H01F1/0536 , B22F3/16 , B22F9/04 , B22F2009/044 , B22F2201/02 , B22F2202/05 , B22F2998/10 , B22F2999/00 , C21D1/74 , C21D3/06 , C22C38/002 , C22C38/005 , C22C38/10 , C22C38/16 , H01F1/0577 , H01F1/08 , B22F3/087 , B22F3/1007 , B22F2201/20 , B22F9/023 , B22F1/0085 , B22F2009/042 , B22F2003/248
摘要： An R-T-B based sintered magnet includes R2T14B crystal grains. A grain boundary formed by the two or more adjacent R2T14B crystal grains includes an R—N—O—C concentrated part having higher concentrations of “R”, N, O, and C than those in the R2T14B crystal grains. “R” of the R—N—O—C concentrated part includes Y. A ratio of Y atom to “R” atom in the R—N—O—C concentrated part is 0.65 or more and 1.00 or less. A ratio of O atom to “R” atom in the R—N—O—C concentrated part is more than 0 and 0.20 or less. A ratio of N atom to “R” atom in the R—N—O—C concentrated part is 0.03 or more and 0.15 or less.

96. 发明授权

US09601246B2 Method of manufacturing magnet, and magnet 有权
公开(公告)号：US09601246B2
公开(公告)日：2017-03-21
申请号：US13771887
申请日：2013-02-20
申请人： JTEKT CORPORATION
发明人： Kazuhisa Sugiyama , Toshiyuki Baba
IPC分类号： H01F1/01 , H01F1/059 , H01F1/06 , H01F1/08 , H01F7/02 , C22C38/00
CPC分类号： H01F1/01 , C22C38/001 , C22C38/005 , H01F1/0596 , H01F1/065 , H01F1/08 , H01F7/02
摘要： A hard magnetic material formed of material powders made of a R—Fe—N compound containing a light rare earth element as R, or material powders made of a Fe—N compound is used as material powders. There is formed a compact in which a density of the hard magnetic material powders differs between an outer face side portion and an inside portion of the compact such that a rate of progress of powder bonding due to microwave heating is higher in the inside portion of the compact than in the outer face side portion of the compact when an outer face of the compact is irradiated with microwaves. Then, the outer face of the compact is irradiated with the microwaves to cause the microwave heating, thereby bonding the hard magnetic material powders by oxide films which are formed on the hard magnetic material powders.

97. 发明申请

US20160042849A1 MAGNETIC MATERIAL INCLUDING a"-Fe16(NxZ1-x)2 OR A MIXTURE OF a"-Fe16Z2 AND a"-Fe16N2, WHERE Z INCLUDES AT LEAST ONE OF C, B, OR O 审中-公开
标题翻译：包含“-Fe16（NxZ1-x）2或”-Fe16Z2和“-Fe16N2的混合物”的磁性材料，其中Z包括至少一个C，B或O
公开(公告)号：US20160042849A1
公开(公告)日：2016-02-11
申请号：US14820284
申请日：2015-08-06
申请人： Regents of the University of Minnesota
发明人： Jian-Ping Wang , Yanfeng Jiang , Md Aminul Mehedi
IPC分类号： H01F1/147 , C23C14/14 , C23C14/34 , C21D6/00 , H01F41/14 , B22F9/04 , C30B19/00 , C30B23/06 , C30B29/38 , H01F1/053 , C22C38/00 , C21D1/26
CPC分类号： C30B29/38 , B22F9/04 , B22F2009/041 , C01B21/0622 , C21D1/26 , C21D6/00 , C22C1/1031 , C22C1/1084 , C22C33/0292 , C22C38/001 , C22C38/002 , C23C8/26 , C23C14/48 , C23C14/5806 , C23C16/36 , C23C16/4488 , C23C16/56 , C23C28/04 , C23C28/42 , C30B19/00 , C30B23/00 , C30B25/00 , C30B33/02 , H01F1/065 , H01F1/08 , H01F10/147 , H01F41/18
摘要： A magnetic material may include α″-Fe16(NxZ1-x)2 or a mixture of α″-Fe16N2 and α″-Fe16Z2, where Z includes at least one of C, B, or O, and x is a number greater than zero and less than one. In some examples, the magnetic material including α″-Fe16(NxZ1-x)2 or a mixture of α″-Fe16N2 and α″-Fe16Z2 may include a relatively high magnetic saturation, such as greater than about 219 emu/gram, greater than about 242 emu/gram, or greater than about 250 emu/gram. In addition, in some examples, the magnetic material including α″-Fe16(NxZ1-x)2 or a mixture of α″-Fe16N2 and α″-Fe16Z2 may include a relatively low coercivity. Techniques for forming the magnetic material are also described.
摘要翻译：磁性材料可以包括α“-Fe16（NxZ1-x）2或α”-Fe16N2和α“-Fe16Z2的混合物，其中Z包括C，B或O中的至少一个，x是大于零和小于一。在一些实例中，包括α“-Fe16（NxZ1-x）2或α”-Fe16N2和α“-Fe16Z2的混合物的磁性材料可以包括相对高的磁饱和度，例如大于约219emu /克，更大比约242emu /克，或大于约250emu /克。此外，在一些实例中，包括α“-Fe16（NxZ1-x）2或α”-Fe16N2和α“-Fe16Z2的混合物的磁性材料可包括较低的矫顽力。还描述了用于形成磁性材料的技术。

98. 发明授权

US09136049B2 Magnesium—aluminium magnetic powder and method for making same 有权
标题翻译：镁铝磁粉及其制作方法
公开(公告)号：US09136049B2
公开(公告)日：2015-09-15
申请号：US13499245
申请日：2009-11-10
申请人： Jung-Goo Lee , Chul-Jin Choi
发明人： Jung-Goo Lee , Chul-Jin Choi
IPC分类号： H01F1/08 , B22F1/00 , B82Y30/00 , C22C1/04 , H01F1/047
CPC分类号： H01F1/08 , B22F1/0018 , B22F2998/10 , B82Y30/00 , C22C1/04 , C22C1/0416 , H01F1/047 , B22F1/0003 , B22F3/02 , B22F9/12 , B22F1/0085
摘要： This invention relates to Mn—Al magnetic powders of a high coercive force which are obtained from Mn—Al alloy vaporized by plasma arc discharging, and a manufacturing method thereof.The Mn—Al magnetic powders are produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles.According to the present invention, the Mn—Al magnetic powders of light weight and enhanced corrosion resistance are produced at a low cost.
摘要翻译：本发明涉及由通过等离子体电弧放电气化的Mn-Al合金获得的高矫顽力的Mn-Al磁粉及其制造方法。通过将等离子体电弧放电到通过压制含有20-60重量％的Mn粉末和40-80重量％的Al粉末的共混物形成的压块来制造Mn-Al磁性粉末，收集纳米尺度的Mn-Al颗粒在蒸发的混合物冷却后，对该颗粒进行热处理。根据本发明，以低成本制造重量轻且耐腐蚀性提高的Mn-Al磁粉。

99. 发明申请

US20150034856A1 NANOPARTICLE, PERMANENT MAGNET, MOTOR, AND GENERATOR 审中-公开
标题翻译： NANOPARTICLE，永久磁铁，电机和发电机
公开(公告)号：US20150034856A1
公开(公告)日：2015-02-05
申请号：US14383454
申请日：2013-02-11
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Gotthard Rieger
IPC分类号： H01F1/03
CPC分类号： H01F1/0302 , B22F1/0025 , B22F1/025 , B32B15/01 , B32B15/013 , C22C19/05 , C22C19/07 , C22C22/00 , C22C33/02 , C22C38/002 , C22C38/08 , C22C38/10 , H01F1/0054 , H01F1/0579 , H01F1/068 , H01F1/08 , H01F1/14741
摘要： At least one elongated core, made of at least one first magnetizable and/or magnetic material, and a shell, surrounding the core and made of at least one second magnetocrystalline anisotropic material, form a nanoparticle. A plurality of such nanoparticles are used in making a permanent magnet. A motor or a generator includes at least one such permanent magnet.
摘要翻译：由至少一个第一可磁化和/或磁性材料制成的至少一个细长芯体和围绕芯部并由至少一个第二磁晶各向异性材料制成的壳体形成纳米颗粒。在制造永磁体时使用多个这样的纳米颗粒。电动机或发电机包括至少一个这样的永磁体。

100. 发明申请

US20140374643A1 MAGNET MANUFACTURING METHOD AND MAGNET 审中-公开
标题翻译：磁铁制造方法和磁铁
公开(公告)号：US20140374643A1
公开(公告)日：2014-12-25
申请号：US14304360
申请日：2014-06-13
申请人： JTEKT CORPORATION
发明人： Takumi MIO , Koji NISHI , Toshiyuki BABA
IPC分类号： H01F41/02 , C01B21/06 , H01F1/10
CPC分类号： H01F41/0266 , C01B21/0622 , C01B21/0627 , C01P2006/42 , H01F1/059 , H01F1/08 , H01F1/10
摘要： There is provided a magnet manufacturing method with which a high residual magnetic flux density is obtained without using dysprosium (Dy) and without using a bonding agent. Magnetic powders made of a hard magnetic material formed of a R—Fe—N compound containing a rare earth element as R or formed of a Fe—N compound are used. In a pressurizing step, the magnetic powders are pressurized by molds multiple times to form a primary compact. In a baking step, a secondary compact is formed by heating the primary compact in an oxidizing atmosphere at a temperature lower than a decomposition temperature of the magnetic powders to bond together the outer surfaces of the adjacent magnetic powders with oxide films formed on the outer surfaces of the magnetic powders.
摘要翻译：提供了一种在不使用镝（Dy）并且不使用粘合剂的情况下获得高剩余磁通密度的磁体制造方法。使用由含有稀土元素R或由Fe-N化合物形成的R-Fe-N化合物形成的硬磁性材料制成的磁性粉末。在加压步骤中，磁粉通过模具多次加压以形成初级压块。在烘烤步骤中，通过在低于磁粉的分解温度的温度下，在氧化气氛中加热初级压块，形成二次压块，将邻接的磁粉的外表面与形成在外表面上的氧化膜粘合在一起的磁粉。

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