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.

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

IPC: C01G49/00 ,  H01F1/113 ,  H05K9/00

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.

公开(公告)号：US20180008966A1

公开(公告)日：2018-01-11

申请号：US15544665

申请日：2016-01-26

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA ,  Takao SUGIURA

IPC: B01J23/889 ,  B01J23/89 ,  B01J35/00 ,  B01J35/02

CPC classification number: B01J23/8892 ,  B01J23/002 ,  B01J23/005 ,  B01J23/745 ,  B01J23/889 ,  B01J23/89 ,  B01J23/8906 ,  B01J23/8913 ,  B01J23/892 ,  B01J23/8926 ,  B01J23/8986 ,  B01J32/00 ,  B01J35/0006 ,  B01J35/0013 ,  B01J35/002 ,  B01J35/0026 ,  B01J35/0033 ,  B01J35/004 ,  B01J35/008 ,  B01J35/023 ,  B01J35/08 ,  B01J35/1009 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/0063 ,  B01J37/0211 ,  B01J37/088 ,  B01J37/16 ,  B01J2523/00 ,  C01G23/047 ,  C01G49/0072 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  G03G9/107 ,  G03G9/113 ,  G03G9/1139 ,  B01J2523/22 ,  B01J2523/24 ,  B01J2523/47 ,  B01J2523/72 ,  B01J2523/842 ,  B01J2523/19 ,  B01J2523/18 ,  B01J2523/17 ,  B01J2523/828 ,  B01J2523/822 ,  B01J2523/821 ,  B01J2523/824 ,  B01J2523/847 ,  B01J2523/845

Abstract: An object of the present invention is to provide ferrite particles for supporting a catalyst having a small apparent density, various properties are maintained in a controllable state and a specified volume is filled with a small weight, and a catalyst using the ferrite particles for supporting a catalyst. To achieve the object, ferrite particles for supporting a catalyst provided with an outer shell structure containing Ti oxide, a catalyst using the ferrite particles for supporting a catalyst are employed.

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

IPC: H01F1/34 ,  C09D157/06 ,  C01G49/00 ,  C09D7/12 ,  C08K3/00 ,  C08K9/02 ,  C08K9/06

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.

公开(公告)号：US20240079172A1

公开(公告)日：2024-03-07

申请号：US18261237

申请日：2022-01-13

Applicant: POWDERTECH CO., LTD.

Inventor： Kazutaka ISHII ,  Koji AGA

IPC: H01F10/20

CPC classification number: H01F10/20

Abstract: A magnetic composite includes a metal base material and a ferrite layer provided on a surface of the metal base material, the metal base material has a thickness of 0.001 μm or more, and the ferrite layer has a thickness of 2.0 μm or more, contains spinel-type ferrite as a principal component, and has a ratio of 0.00 or more and 0.03 or less, the ratio being of an integrated intensity of a (222) plane to an integrated intensity of a (311) plane in X-ray diffraction analysis.

公开(公告)号：US20210168974A1

公开(公告)日：2021-06-03

申请号：US16636279

申请日：2018-08-02

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA

IPC: H05K9/00 ,  C09C1/24 ,  C08K9/02 ,  C08K3/22 ,  C08K7/18 ,  H01F1/34

Abstract: The present invention provides: composite particles each comprising a base particle composed of ferrite, and a coating layer composed of a material containing at least one element selected from the group consisting of Au, Ag, Pt, Ni and Pd; a powder characterised by containing a plurality of the composite particles; a resin composition characterised by containing the powder and a resin material; and a moulded body characterised by being produced using a material containing the powder and the resin material.

公开(公告)号：US20200003268A1

公开(公告)日：2020-01-02

申请号：US16466427

申请日：2017-12-12

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA ,  Takashi KOJIMA

IPC: F16D69/02 ,  C01G49/06

Abstract: Provided is an iron oxide powder for a brake friction material which can be suitably used in a brake friction material that is less likely to cause problems regarding brake squealing and that provides superior braking performance. The iron oxide powder for a brake friction material according to a first embodiment of the present invention is characterized by having a sulfur content of 150 ppm or less as measured by combustion ion chromatography, and a saturation magnetization of 20 emu/g or less. The iron oxide powder for a brake friction material according to a second embodiment of the present invention is characterized by having an average particle size of 1.0 μm or more, a chlorine content of 150 ppm or less as measured by combustion ion chromatography, and a saturation magnetization of 20 emu/g or less.

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

IPC: H05K9/00 ,  C01G53/00 ,  C08K3/22 ,  H01F1/34 ,  H01F1/375 ,  H05K1/02

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.

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

IPC: H01F1/375 ,  G03G9/107 ,  C22C38/08 ,  C22C38/16

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.

公开(公告)号：US20190300379A1

公开(公告)日：2019-10-03

申请号：US16307794

申请日：2017-05-31

Applicant: POWDERTECH CO., LTD.

Inventor： Takashi KOJIMA ,  Kazutaka ISHII ,  Takao SUGIURA ,  Tetsuya IGARASHI ,  Koji AGA

IPC: C01G49/00 ,  C08K3/22 ,  C08K7/18 ,  C30B29/22 ,  C30B29/60 ,  H01F1/34 ,  H05K9/00

Abstract: An object of the present invention is to provide ferrite particles having a high magnetic permeability in a frequency band of 1 MHz to 1 GHz. Another object is to provide a resin composition containing the ferrite particles and an electromagnetic wave shielding material composed of the resin composition. The ferrite particles are composed of a single crystalline body having an average particle size of 1 to 2000 nm and has a spherical particle shape, wherein the ferrite particles contain substantially no Zn, 3 to 25 wt % of Mn, and 43 to 65 wt % of Fe, and a real part μ′ of a complex magnetic permeability measured using a molding composed of the ferrite particles and a binder resin has a maximal value in a frequency band of 100 MHz to 1 GHz.