公开(公告)号：EP2767992A1

公开(公告)日：2014-08-20

申请号：EP12840664.2

申请日：2012-10-09

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： SAKUMA, Noritsugu ,  KISHIMOTO, Hidefumi ,  MIYAMOTO, Noritaka ,  KATO, Akira ,  MANABE, Akira ,  MANABE, Akira ,  ICHIGOZAKI, Daisuke ,  SHOJI, Tetsuya ,  HARAKAWA, Shoichi

IPC分类号： H01F41/02 ,  B22F1/00 ,  C22C33/02 ,  C22C38/00 ,  H01F1/057 ,  H01F1/08

CPC分类号： H01F1/20 ,  B22F9/04 ,  B22F2009/048 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C2202/02 ,  H01F1/0571 ,  H01F1/0577

摘要： A method for producing magnetic powder for forming a sintered body that is a precursor of a rare-earth magnet. Provided is a method for producing magnetic powder for forming a sintered body that is a precursor of a rare-earth magnet, which can produce magnetic powder with a structure containing optimal nanosized crystal grains by accurately and efficiently sorting out magnetic powder containing no coarse grains in the structure thereof. A method for producing magnetic powder p for forming a sintered body S that is a precursor of a rare-earth magnet, the sintered body S including an Nd-Fe-B-based main phase with a nanocrystalline structure, and a grain boundary phase around the main phase, and the rare-earth magnet being adapted to be formed by applying hot deformation processing to the sintered body S for imparting anisotropy thereto and diffusing an alloy for improving coercivity therein, the method including discharging a metal melt onto a chill roll R to produce a quenched ribbon B, and grinding the quenched ribbon B into grains in the size range of 50 to 1000 µm to produce magnetic powder in the mass range of 0.0003 to 0.3 mg; conducting a test to see whether or not the magnetic powder in the mass range adsorbs onto a magnet with a surface magnetic flux density of 2 mT or less, and sorting out magnetic powder p that has not adsorbed onto the magnet, as the magnetic powder for forming the sintered body S.

公开(公告)号：EP2513917A1

公开(公告)日：2012-10-24

申请号：EP10814768.7

申请日：2010-12-16

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： SAKUMA, Noritsugu ,  SHOJI, Tetsuya ,  YANO, Masao

IPC分类号： H01F1/057

CPC分类号： H01F1/0571 ,  B82Y25/00 ,  C22C33/003 ,  C22C38/002 ,  C22C38/005 ,  C22C45/02 ,  C22F3/00 ,  H01F1/0579

摘要： A rare earth magnet of the invention has a composition represented by the compositional formula RaHbFecCodBeMf, where: R is at least one rare earth element including Y; H is at least one heavy rare earth element from among Dy and Tb; M is at least one element from among Ga, Zn, Si, Al, Nb, Zr, Ni, Cu, Cr, Hf, Mo, P, C, Mg, and V; 13≦̸a≦̸20; 0≦̸b≦̸4; c=100−a−b−d−e−f; 0≦̸d≦̸30; 4≦̸e≦̸20; 0≦̸f≦̸3, and has a structure constituted by a main phase: a (RH)2(FeCo)14B phase, and a grain boundary phase: a (RH)(FeCo)4B4 phase and a RH phase, with a crystal grain size of the main phase of 10 nm to 200 nm.

公开(公告)号：EP2246924A1

公开(公告)日：2010-11-03

申请号：EP09705680.8

申请日：2009-01-26

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： UENO, Yukiyoshi ,  NAGAMI, Tetsuo ,  SHOJI, Tetsuya

IPC分类号： H01M4/90 ,  B01J23/89 ,  B01J37/02 ,  H01M4/88 ,  H01M4/92 ,  H01M8/10

CPC分类号： H01M4/921 ,  H01M4/926 ,  H01M2008/1095

摘要： An electrode catalyst for a fuel cell, which has improved performance compared with conventional platinum alloy catalysts, a method for producing the electrode catalyst, and a polymer electrolyte fuel cell using the electrode catalyst are provided. The electrode catalyst for a fuel cell comprises a noble-metal-non-precious metal alloy that has a core-shell structure supported on a conductive carrier. The composition of the catalyst components of the shell is such that the amount of the noble metal is greater than or equal to the amount of the non-precious metal.

摘要翻译： 提供了与常规铂合金催化剂相比具有改进的性能的燃料电池用电极催化剂，使用该电极催化剂的电极催化剂的制造方法和固体高分子型燃料电池。 用于燃料电池的电极催化剂包括具有负载在导电载体上的核 - 壳结构的贵金属 - 非贵金属合金。 壳的催化剂组分的组成使得贵金属的量大于或等于非贵金属的量。

公开(公告)号：EP2140957A1

公开(公告)日：2010-01-06

申请号：EP07742840.7

申请日：2007-04-25

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： SHOJI, Tetsuya ,  NAKAMURA, Naoki ,  KATO, Akira ,  YAMAMOTO, Shinpei ,  TAKANO, Mikio ,  ONO, Teruo

IPC分类号： B22F1/02

CPC分类号： B22F1/025 ,  B22F1/0018 ,  B22F9/24 ,  B22F9/305 ,  B82Y30/00

摘要： A method of producing core/shell composite nano-particles exhibiting superior characteristics, by using as cores nano-particles heat treated in advance so as to give them a specific crystal structure in a state using a barrier layer to prevent sintering and forming shells on their surface, which eliminates hindrances to the shell forming reaction due to the phase transfer catalyst or other strongly sticky dispersant, is provided. A method of producing core/shell composite nano-particles comprising nano-sized core particles covered by shells, the method comprising dispersing core particles heat treated in advance to give them a crystal structure expressing the necessary characteristics in a first organic solvent by a first dispersant to prepare a first solution, adding a polar solvent to peel off the first dispersant from the core particles and making the nano-particles agglomerate to recover them, making the recovered core particles disperse in a second organic solvent by a second dispersant to form a second solution, and adding a precursor of the shells to the second solution and forming shells on the surfaces of the core particles.

摘要翻译： 通过使用预先热处理的核心纳米粒子来制造具有优异特性的核/壳复合纳米粒子的方法，以便在使用阻挡层的状态下给予其特定的晶体结构，以防止烧结和形成壳体 表面，其消除了由于相转移催化剂或其它强粘性分散剂而导致的壳形成反应的障碍。 一种包含由壳体覆盖的纳米尺寸的核心颗粒的核/壳复合纳米颗粒的制造方法，该方法包括将预先热处理的芯颗粒分散在第一有机溶剂中，使第一分散剂形成表达必要特性的晶体结构 制备第一溶液，加入极性溶剂以从核心颗粒中剥离第一分散剂并使纳米颗粒凝聚回收它们，使回收的芯颗粒通过第二分散剂分散在第二有机溶剂中以形成第二溶剂 溶液，并将壳的前体添加到第二溶液中并在芯颗粒的表面上形成壳。

公开(公告)号：EP2087493A2

公开(公告)日：2009-08-12

申请号：EP07859355.5

申请日：2007-11-01

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： SAKUMA, Noritsugu ,  SHOJI, Tetsuya

IPC分类号： H01F1/057 ,  B22F9/24

CPC分类号： H01F41/0266 ,  B22F1/025 ,  B22F9/24 ,  B22F2999/00 ,  B82Y25/00 ,  C22C33/0257 ,  C22C38/002 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0577 ,  H01F1/0579

摘要： A nanocomposite magnet having a core-shell structure that includes a hard magnetic phase of an Nd2Fe14B compound as a core (1) and a soft magnetic phase of Fe as a shell (2) is produced by adding and dispersing particles of the Nd2Fe14B compound into a solvent that contains a surface-active agent, and then adding thereto an Fe precursor so as to cause Fe particles on the surface of the Nd2Fe14B compound, and drying and sintering the particles of the Nd2Fe14B compound.