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1.发明申请公开(公告)号：US20180179082A1
公开(公告)日：2018-06-28
申请号：US15511492
申请日：2015-08-31
Inventor： Koji AGA , Tetsuya IGARASHI , Akio TAKAHASHI
CPC classification number: C01G49/0072 , C01P2002/50 , C01P2004/32 , C01P2004/51 , C01P2004/61 , C01P2006/12 , C01P2006/42 , C08K3/22 , C08K9/04 , C08K2003/2265 , C08L101/00 , C09C1/22 , C09C1/24 , H01F1/00 , H01F1/37
Abstract: The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less than 11 μm and have the volume average particle diameter of 10 to 50 μm; the resin compound including the ferrite powder; and the molded product made of the resin compound are employed.
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公开(公告)号：US20170349449A1
公开(公告)日：2017-12-07
申请号：US15541408
申请日：2016-01-21
Applicant: POWDERTECH CO., LTD.
Inventor： Koji AGA , Tetsuya IGARASHI
CPC classification number: C01G49/06 , C01G49/00 , C01G53/00 , C01P2004/20 , C01P2006/42 , C09C1/24 , C09C1/245 , C09D5/36 , C09D7/69 , C09D7/70 , H01F1/36 , H05K9/00 , H05K9/0026
Abstract: An object is to provide a plate shaped ferrite particle for a pigment, having both of electromagnetic wave shielding ability and designability, a resin molded material containing the plate shaped ferrite particle a pigment, and an electromagnetic wave shield housing for storing an electronic circuit manufactured by using the resin molded material. To achieve the object, the plate shaped ferrite particles for a pigment having a metallic luster, a resin molded material containing the plate shaped ferrite particles for a pigment, an electromagnetic wave shield housing for storing an electronic circuit manufactured by using the resin molded material are employed.
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公开(公告)号：US20190135653A1
公开(公告)日：2019-05-09
申请号：US16095710
申请日：2017-04-11
Applicant: Powdertech Co., Ltd.
Inventor： Koji AGA , Tetsuya IGARASHI
IPC: C01G49/02 , C08L101/00 , C08K3/22 , H01F1/37 , A47J36/02
Abstract: Ferrite powder of the present invention is ferrite powder detectable with a metal detector, comprising: soft ferrite particles containing Mn of 3.5 mass % or more and 20.0 mass % or less and Fe of 50.0 mass % or more and 70.0 mass % or less. It is preferable that a volume average particle diameter of the particles constituting the ferrite powder is 0.1 μm or more and 100 μm or less. It is preferable that magnetization by a VSM measurement when magnetic field of 5 K·1000/4πA/m is applied is 85 A·m2/kg or more and 98 A·m2/kg or less.
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公开(公告)号：US20180009677A1
公开(公告)日：2018-01-11
申请号：US15544626
申请日：2016-01-21
Applicant: POWDERTECH CO., LTD.
Inventor： Koji AGA , Tetsuya IGARASHI
CPC classification number: C01G49/0036 , C01G49/00 , C01P2004/22 , C01P2004/54 , C01P2004/61 , C01P2006/42 , H01F1/113 , H01F1/348 , H01F1/37 , H05K9/00 , H05K9/0081
Abstract: Objects are to provide a ferrite powder having a residual magnetization and a coercive force larger than those of spherical hard ferrite particle, and magnetic permeability μ″ is maximum in a specific frequency range, a manufacturing method thereof, a resin compound containing the ferrite powder, and a molded product made from the resin compound. To achieve the objects, a hexagonal plate shaped ferrite powder containing 7.8 to 9 wt % of Sr, 61 to 65 wt % of Fe, and 0.1 to 0.65 wt % of Mg, a manufacturing method thereof, a resin compound containing the hexagonal plate shaped ferrite powder, and a molded product made from the resin compound are employed.
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公开(公告)号：US20170301443A1
公开(公告)日：2017-10-19
申请号：US15511727
申请日：2015-09-02
Applicant: POWDERTECH CO., LTD.
Inventor： Koji AGA , Tetsuya IGARASHI
Abstract: An object is to provide the ferrite particles used as a magnetic filler or a raw material for a molded product excellent in dispersibility as a powder and excellent in uniformity after molding and result the surface with small unevenness; and a method of manufacturing the particles. To achieve the object, Mn—Mg ferrite particles having an average particle size of 1 to 2000 nm and having a spherical shape are employed. It is preferable that the ferrite particles are produced by a method including subjecting of a ferrite raw material obtained through preparation of a ferrite composition to flame-spraying in air for ferritization followed by rapid cooling for solidifying of the ferrite.
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Patent Agency Ranking
公开(公告)号：US20210047200A1
公开(公告)日：2021-02-18
申请号：US16967197
申请日：2019-02-06
Applicant: POWDERTECH CO., LTD.
Inventor： Koji AGA , Takashi KOJIMA , Kazutaka ISHII , Tetsuya IGARASHI , Sho KUWAHARA
Abstract: Provided are: an Mn ferrite powder characterized by including a plurality of ferrite particles, having a volume-average particle diameter of 1-10 μm, and having a 2.106 μm volume-based cumulative distribution (sieved) of 0.1-50.0 vol %; and a resin composition characterized by including said powder and a resin material.
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7.发明申请公开(公告)号：US20200251263A1
公开(公告)日：2020-08-06
申请号：US16650647
申请日：2018-09-27
Applicant: POWDERTECH CO., LTD.
Inventor： Takashi KOJIMA , Kazutaka ISHII , Takao SUGIURA , Tetsuya IGARASHI , Koji AGA
Abstract: Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.
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公开(公告)号：US20190040226A1
公开(公告)日：2019-02-07
申请号：US16083533
申请日：2017-03-27
Applicant: Powdertech Co., Ltd.
Inventor： Koji AGA , Tetsuya IGARASHI
Abstract: Ferrite powder of the present invention is ferrite powder detectable with a metal detector, comprising: hard ferrite particles containing Sr of 7.8 mass % or more and 9.0 mass % or less and Fe of 61.0 mass % or more and 65.0 mass % or less, wherein an amount of Na to be measured by ion chromatography is 1 ppm or more and 200 ppm or less. It is preferable that a volume average particle diameter of the particles constituting the ferrite powder is 0.1 μm or more and 100 μm or less. It is preferable that residual magnetization by a VSM measurement when magnetic field of 10 K·1000/4πA/m is applied is 25 A·m2/kg or more and 40 A·m2/kg or less.
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公开(公告)号：US20190343027A1
公开(公告)日：2019-11-07
申请号：US16094081
申请日：2017-04-05
Applicant: POWDERTECH CO., LTD
Inventor： Koji AGA , Tetsuya IGARASHI
Abstract: The present invention provides a powdered ferrite having high dispersibility in a resin and high electromagnetic shielding characteristics. The powdered ferrite comprises platy ferrite particles having a spinel crystal structure. The powdered ferrite comprises at least 50 number % platy ferrite particles each having at least one protrusion on a surface of the particle, and the protrusion has a shape selected from the group consisting of a rectangular pyramid, a truncated rectangular pyramid, an elongated rectangular pyramid, and combinations thereof.
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公开(公告)号：US20190341177A1
公开(公告)日：2019-11-07
申请号：US16336644
申请日：2017-06-07
Applicant: POWDERTECH CO., LTD.
Inventor： Takashi KOJIMA , Kazutaka ISHII , Takao SUGIURA , Tetsuya IGARASHI , Koji AGA
Abstract: An object of the present invention is to provide ferrite particles having high saturation magnetisation and electrical resistivity, excellent in dispersibility in a resin, a solvent, or a resin composition; a rein composition containing the ferrite particles; and a resin molding composed of the resin composition. A Ni-Zn-Cu ferrite particle is in a single crystalline body having an average particle diameter of 1 to 2000 nm, has a polyhedral particle shape, and comprises 5 to 10 wt % of Ni, 15 to 30 wt % of Zn, 1 to 5 wt % of Cu, and 25 to 50 wt % of Fe.
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