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    MNZNCO-BASED FERRITE
    2.
    发明公开
    MNZNCO-BASED FERRITE 审中-实审

    公开(公告)号：EP4342869A1

    公开(公告)日：2024-03-27

    申请号：EP23817281.1

    申请日：2023-06-12

    Applicant: JFE Chemical Corporation

    Inventor： NOJIMA Azumi ,  SOGA Naoki ,  NAKAMURA Yukiko

    IPC: C04B35/38 ,  C04B35/26 ,  C04B35/32 ,  C04B35/34 ,  C04B35/36 ,  H01F1/03 ,  H01F1/10

    Abstract: To provide MnZnCo-based ferrite with small magnetic losses over a wide frequency range and a wide temperature range. Disclosed is MnZnCo-based ferrite containing basic components and auxiliary components, in which the basic components are Fe 2 O 3 : 51.00 mol% or more and less than 58.00 mol%, ZnO: 6.00 mol% or more and less than 13.00 mol%, and CoO: more than 0.10 mol% and 0.50 mol% or less, with the balance being MnO, and the auxiliary components are 50 mass ppm to 500 mass ppm of Si in terms of SiO 2 , 200 mass ppm to 2000 mass ppm of Ca in terms of CaO, 85 mass ppm to 500 mass ppm of Nb in terms of NbzOs, and 5 mass ppm to 20 mass ppm of K, relative to the basic components.

    FERRITE PARTICLE, CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER
    8.
    发明公开
    FERRITE PARTICLE, CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER 审中-公开

    公开(公告)号：EP4201914A1

    公开(公告)日：2023-06-28

    申请号：EP21861522.7

    申请日：2021-08-24

    Applicant: Powdertech Co., Ltd.

    Inventor： ISHIKAWA, Makoto ,  UEMURA, Tetsuya

    IPC: C04B35/36 ,  C01G49/00 ,  G03G9/107

    Abstract: [Problem] To provide: ferrite particles that have high environment stability of charging characteristics, and good charge rise properties; a carrier core material for an electrophotographic developer; a carrier for an electrophotographic developer; and an electrophotographic developer.
    [Solution] The present invention is characterized by containing a crystal phase component including a perovskite crystal represented by composition formula RZrO 3 (where R represents an alkaline-earth metal element), and by containing Mg in an amount of 0.45 mass% or less. In addition, the ferrite particles are used as a carrier core material for an electrophotographic developer. In addition, by using same, a carrier for an electrophotographic developer and an electrophotographic developer are obtained.

    COMPOSITIONS AND MATERIALS FOR ELECTRONIC APPLICATIONS
    9.
    发明公开
    COMPOSITIONS AND MATERIALS FOR ELECTRONIC APPLICATIONS 审中-公开

    公开(公告)号：EP3438074A1

    公开(公告)日：2019-02-06

    申请号：EP18173412.0

    申请日：2011-09-22

    Applicant: Skyworks Solutions, Inc.

    Inventor： Anderson, Kelvin, M. ,  Hill, Michael, D ,  Cruickshank, David, Bowie

    IPC: C04B35/30 ,  C04B35/32 ,  C04B35/36 ,  C04B35/01 ,  C04B35/26 ,  C01G53/00 ,  C01G49/00

    Abstract: Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co +2 such that the relaxation peak associated with the Co +2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.

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