公开(公告)号：US4865834A

公开(公告)日：1989-09-12

申请号：US156508

申请日：1988-02-16

申请人： Mamoru Tanihara ,  Yoshiro Okuda ,  Hideaki Sadamura

发明人： Mamoru Tanihara ,  Yoshiro Okuda ,  Hideaki Sadamura

IPC分类号： G11B5/706

CPC分类号： G11B5/70689

摘要： Plate-like magnetite particles, plate-like maghemite particles and the processes for producing these particles are herein disclosed. The plate-like magnetite particles and the plate-like maghemite particles provided according to the present invention are fine plate-like particles which are poreless and non-sintered as the plate-like magnetite particles are produced directly from an aqueous solution and these plate-like magnetite particles are oxidized by heating to produce the plate-like maghemite particles. Therefore, these particles can be filled to a high density in a vehicle or resin, have good dispersibility and orientability and are also high in a degree of particle contact, so that they are suited for use as electromagnetic wave absorbing and shielding material, magnetic material for magnetic recording, black or brown pigment for paints and colorant for rubber and plastic products.

公开(公告)号：US6103213A

公开(公告)日：2000-08-15

申请号：US45542

申请日：1998-03-23

申请人： Tatsuya Nakamura ,  Hideaki Sadamura ,  Mitsuaki Hatatani ,  Akihisa Kajiyama ,  Yoshiro Okuda

发明人： Tatsuya Nakamura ,  Hideaki Sadamura ,  Mitsuaki Hatatani ,  Akihisa Kajiyama ,  Yoshiro Okuda

IPC分类号： C01G51/00 ,  H01M4/52 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/36 ,  C01B13/14 ,  C01G49/00 ,  H01M6/14

CPC分类号： H01M10/0525 ,  B82Y30/00 ,  C01G51/04 ,  C01G51/42 ,  H01M4/525 ,  C01P2002/32 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/64 ,  C01P2006/10 ,  C01P2006/12

摘要： A process for producing lithium-cobalt oxide, comprises: mixing cobalt oxide having a BET specific surface area of 30 to 200 m.sup.2 /g or an average particle size of not more than 0.1 .mu.m, with a lithium compound; and calcining the obtained mixture at a temperature of 500 to 850.degree. C. Such a process for producing lithium-cobalt oxide particles is useful especially as a cathode active substance for lithium ion batteries, which particles can be produced by calcination in a short time, and have a narrow particle size distribution and a uniform small particle size.

摘要翻译： 一种生产锂钴氧化物的方法，包括：将具有30-200m 2 / g的BET比表面积或不大于0.1μm的平均粒径的氧化钴与锂化合物混合; 并在500〜850℃的温度下煅烧所得到的混合物。这种生产锂钴氧化物颗粒的方法特别用作锂离子电池用正极活性物质，该颗粒可以通过在短时间内煅烧来制备， 并且具有窄的粒度分布和均匀的小粒径。

公开(公告)号：US5599378A

公开(公告)日：1997-02-04

申请号：US450205

申请日：1995-05-25

申请人： Akio Mishima ,  Tosiharu Harada ,  Mamoru Tanihara ,  Yasutaka Ota ,  Kenji Okinaka ,  Kohji Mori ,  Hirofumi Kawasaki ,  Norimichi Nagai ,  Katsunori Fujimoto ,  Yoshiro Okuda

发明人： Akio Mishima ,  Tosiharu Harada ,  Mamoru Tanihara ,  Yasutaka Ota ,  Kenji Okinaka ,  Kohji Mori ,  Hirofumi Kawasaki ,  Norimichi Nagai ,  Katsunori Fujimoto ,  Yoshiro Okuda

IPC分类号： G11B5/706 ,  G11B5/714 ,  H01F1/06 ,  H01F1/11 ,  H01F1/36

CPC分类号： G11B5/70621 ,  G11B5/70615 ,  G11B5/714 ,  H01F1/061

摘要： Disclosed herein are spindle-shaped magnetic iron based alloy particles containing at least one selected from the group consisting of Ni, Al, Si, P, Co, Mg, B and Zn, which have a particle length of 0.05 to 0.40 .mu.m, a crystallite size of 110 to 180 .ANG., a specific surface area of 30 to 60 m.sup.2 /g, a coercive force of 1,300 to 1,700 Oe and a saturation magnetization (.sigma.s) of not less than 100 emu/g and a process for producing the same.

摘要翻译： 本文公开了含有选自Ni，Al，Si，P，Co，Mg，B和Zn中的至少一种的锭状磁铁基合金粒子，其粒径为0.05〜0.40μm，a 微晶尺寸为110〜180，比表面积为30〜60m2 / g，矫顽力为1300〜1700Oe，饱和磁化强度（sigma）为100emu / g以上， 相同。

公开(公告)号：US5466306A

公开(公告)日：1995-11-14

申请号：US118287

申请日：1993-09-09

申请人： Akio Mishima ,  Tosiharu Harada ,  Mamoru Tanihara ,  Yasutaka Ota ,  Kenji Okinaka ,  Kohji Mori ,  Hirofumi Kawasaki ,  Norimichi Nagai ,  Katsunori Fujimoto ,  Yoshiro Okuda

发明人： Akio Mishima ,  Tosiharu Harada ,  Mamoru Tanihara ,  Yasutaka Ota ,  Kenji Okinaka ,  Kohji Mori ,  Hirofumi Kawasaki ,  Norimichi Nagai ,  Katsunori Fujimoto ,  Yoshiro Okuda

IPC分类号： G11B5/706 ,  G11B5/714 ,  H01F1/06

CPC分类号： G11B5/70621 ,  G11B5/70615 ,  G11B5/714 ,  H01F1/061

摘要： Disclosed herein are spindle-shaped magnetic iron based alloy particles containing at least one selected from the group consisting of Ni, Al, Si, P, Co, Mg, B and Zn, which have a particle length of 0.05 to 0.40 .mu.m, a crystallite size of 110 to 180 .ANG., a specific surface area of 30 to 60 m.sup.2 /g, a coercive force of 1,300 to 1,700 Oe and a saturation magnetization (.sigma.s) of not less than 100 emu/g and a process for producing the same.

摘要翻译： 本文公开了含有选自Ni，Al，Si，P，Co，Mg，B和Zn中的至少一种的锭状磁铁基合金粒子，其粒径为0.05〜0.40μm，a 微晶尺寸为110〜180，比表面积为30〜60m2 / g，矫顽力为1300〜1700Oe，饱和磁化强度（sigma）为100emu / g以上， 相同。

公开(公告)号：US4514216A

公开(公告)日：1985-04-30

申请号：US573489

申请日：1984-01-24

申请人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

发明人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

IPC分类号： G11B5/706 ,  G11B5/712 ,  H01F1/09 ,  H01F1/33

CPC分类号： G11B5/712 ,  G11B5/706 ,  G11B5/70642

摘要： Disclosed herein is acicular ferromagnetic alloy particles for magnetic recording, containing Si, Cr, Ni and P and optionally Mg impregnated with phosphorus compound and silicon compound and process for producing the same.

摘要翻译： 本文公开了用于磁记录的针状铁磁合金颗粒，其含有Si，Cr，Ni和P，以及任选的Mg被磷化合物和硅化合物浸渍，并且其制备方法。

公开(公告)号：US6030688A

公开(公告)日：2000-02-29

申请号：US907485

申请日：1997-08-08

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Yoshiro Okuda ,  Keisuke Iwasaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Yoshiro Okuda ,  Keisuke Iwasaki

IPC分类号： C01G49/06 ,  C08K3/00 ,  C09C1/24 ,  G11B5/708 ,  G11B5/738

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C08K3/0033 ,  C09C1/24 ,  G11B5/708 ,  G11B5/738 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/39 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/66 ,  C01P2006/80 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24975 ,  Y10T428/257 ,  Y10T428/2991 ,  Y10T428/2993

摘要： Rectangular parallelopipedic lepidocrocite particles of the present invention have a minor axial diameter of 0.045 to 0.5 .mu.m, a major axial diameter of 0.05 to 1.0 .mu.m, and a thickness of 0.001 to 0.3 .mu.m, which are individual. Such rectangular parallelopipedic lepidocrocite particles according to the present invention are firstly used as a coloring pigment for paints, resin moldings, printing ink, road asphalt, cosmetics, etc., and secondly used as a non-magnetic material for non-magnetic undercoat layers which are formed on non-magnetic substrates which constitute a substrate for magnetic recording media, and which have an excellent surface smoothness and a high strength.

摘要翻译： 本发明的长方体形的平行六面体片状白云石颗粒的轴向直径为0.045〜0.5μm，主轴径为0.05〜1.0μm，厚度为0.001〜0.3μm。 本发明的这种长方体形的平行六面体氯雷焦石墨颗粒首先用作油漆，树脂模制品，印刷油墨，道路沥青，化妆品等着色颜料，其次用作非磁性底涂层的非磁性材料 形成在构成磁记录介质用基板的非磁性基板上，具有优异的表面平滑性和高强度。

公开(公告)号：US4437881A

公开(公告)日：1984-03-20

申请号：US513866

申请日：1983-07-14

申请人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

发明人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

IPC分类号： G11B5/706 ,  B22F9/22

CPC分类号： G11B5/70615

摘要： Acicular ferromagnetic alloy particles doped with silicon, chromium and nickel and optionally magnesium and a process for producing said particles comprising heating at 300.degree. to 500.degree. C. under reducing atmosphere acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium or acicular particles of .alpha.-ferric oxide doped with silicon, chromium and nickel and optionally magnesium obtained by dehydrating the acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium are disclosed herein.

摘要翻译： 掺杂有硅，铬和镍以及任选的镁的针状铁磁性合金颗粒和一种制备所述颗粒的方法，包括在还原性气氛下在300℃至500℃下加热掺杂有硅，铬（III）的α-铁氧化物氢氧化物的针状颗粒 公开了镍和任选的掺有硅，铬和镍的α-氧化铁的镁或针状颗粒和任选的镁，其通过使掺杂有硅，铬和镍以及任选的镁的α-铁（III）氧化物氢氧化物的针状颗粒脱水获得， 这里。