利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

83 records (took 0.011 seconds)

    LOW-LOSS OXIDE MAGNETIC MATERIAL
    62.
    发明公开
    LOW-LOSS OXIDE MAGNETIC MATERIAL 失效
    OXID-MAGNETMATERIAL MIT GERINGEM VERLUST。

    公开(公告)号：EP0460215A1

    公开(公告)日：1991-12-11

    申请号：EP90912078.4

    申请日：1990-08-09

    Applicant: TOKIN CORPORATION

    Inventor： SHOJI, Kiyoshi ,  OTSUKA, Tsutomu ,  YONEKURA, Atsushi Tokin Corporation ,  CHIBA, Tetsuyoshi ,  CHIBA, Tatsuya

    IPC: H01F1/34 ,  C04B35/38

    CPC classification number: C04B35/2633 ,  C04B35/2658

    Abstract: A low-loss oxide magnetic material comprising 30 to 42 mole % of MnO, 4 to 19 mole % ZnO, and the balance of Fe₂O₃ as the principal components, and 0.02 to 0.15 wt % of CaO and 0.005 to 0.10 wt % of SiO₂ as the subsidiary components, and containing 1.00 wt % or less (exclusive of oxygen) of an additive of grain boundary deposition type, such as HfO₂. This material also contains Ga₂O₃ which reacts with the principal components to improve the wettability during sintering.

    Abstract translation: 低损耗氧化物磁性材料包含30至42摩尔％的MnO，4至19摩尔％的ZnO和余量的Fe 2 O 3作为主要成分，0.02至0.15重量％的CaO和0.005至0.10重量％的SiO 2作为 辅助成分，含有HfO 2等的晶界沉积型添加剂的1.00重量％以下（不含氧）。 该材料还含有与主要成分反应的Ga 2 O 3，以提高烧结时的润湿性。 @（42pp Dwg.No.3 / 3）@。

    Process of preparing ferrite with a predetermined ferrous content
    63.
    发明公开
    Process of preparing ferrite with a predetermined ferrous content 失效
    用预处理的内含物制备铁素体的方法

    公开(公告)号：EP0149758A3

    公开(公告)日：1985-08-14

    申请号：EP84114283

    申请日：1984-11-27

    Applicant: International Business Machines Corporation

    Inventor： Scheidecker, Ralph William ,  Suchomel, Robert Richard

    IPC: C04B35/38 ,  C01G49/02

    CPC classification number: C01G49/009 ,  C01P2002/32 ,  C04B35/2658

    Abstract: Process of calcining and ball milling Manganese Zinc MnZn, ferrite material for achieving a ferrite having a ferrous iron content appropriate for optimum magnetic properties. The process includes a controlled atmosphere, time, and temperature for the calcining process step, and a controlled ball milling step overtime where the interaction of the stainless steel balls and milled slurry contributes to final ferrous iron content. These two process steps are balanced yielding a MnZn ferrite of a predetermined particle size with a controlled ferrous iron content which is a function of both the calcining and ball milling steps.

    Process of preparing ferrite with a predetermined ferrous content
    64.
    发明公开
    Process of preparing ferrite with a predetermined ferrous content 失效
    Verfahren zum Herstellen eines Ferrits mit einem vorausbestimmten Ferrogehalt Eisen-（11）-Gehalt。

    公开(公告)号：EP0149758A2

    公开(公告)日：1985-07-31

    申请号：EP84114283.9

    申请日：1984-11-27

    Applicant: International Business Machines Corporation

    Inventor： Scheidecker, Ralph William ,  Suchomel, Robert Richard

    IPC: C04B35/38 ,  C01G49/02

    CPC classification number: C01G49/009 ,  C01P2002/32 ,  C04B35/2658

    Abstract: Process of calcining and ball milling Manganese Zinc MnZn, ferrite material for achieving a ferrite having a ferrous iron content appropriate for optimum magnetic properties. The process includes a controlled atmosphere, time, and temperature for the calcining process step, and a controlled ball milling step overtime where the interaction of the stainless steel balls and milled slurry contributes to final ferrous iron content. These two process steps are balanced yielding a MnZn ferrite of a predetermined particle size with a controlled ferrous iron content which is a function of both the calcining and ball milling steps.

    Abstract translation: 煅烧和球磨方法锰锰锌锰铁氧体材料，用于实现铁素体铁素体，其铁含量适合于最佳的磁性能。 该方法包括煅烧工艺步骤的受控气氛，时间和温度，以及超时间的受控球磨步骤，其中不锈钢球和研磨浆料的相互作用有助于最终的二价铁含量。 这两个工艺步骤是平衡的，产生具有受控的亚铁含量的预定粒度的MnZn铁氧体，其是煅烧和球磨步骤的函数。

    MNZN-BASED FERRITE
    65.
    发明公开
    MNZN-BASED FERRITE 审中-公开

    公开(公告)号：EP4497738A1

    公开(公告)日：2025-01-29

    申请号：EP23774729.0

    申请日：2023-03-16

    Applicant: Toda Kogyo Corp.

    Inventor： KOUJIMA Jun ,  Shin Bum Gyun ,  Lee Jang Wook

    IPC: C04B35/38 ,  H01F1/34

    Abstract: MnZn-based ferrite according to the present invention includes, as major components, 50 mol % to 53 mol % Fe 2 O 3 , 8 mol % to 10 mol % ZnO, and 37 mol % to 42 mol % MnO on an oxide basis, the MnZn-based ferrite containing, as minor components, less than or equal to 120 ppm SiO 2 , 100 ppm to 500 ppm Nb 2 O 5 , 0 ppm to 200 ppm ZrO 2 , 2000 ppm to 4000 ppm Co 3 O 4 , and 0 ppm to 1500 ppm SnO 2 on an oxide basis.

    METHOD FOR INCREASING BS OF MNZN POWER FERRITE MATERIAL BY MOVING VALLEY POINT
    66.
    发明公开
    METHOD FOR INCREASING BS OF MNZN POWER FERRITE MATERIAL BY MOVING VALLEY POINT 审中-公开

    公开(公告)号：EP4063338A1

    公开(公告)日：2022-09-28

    申请号：EP20889372.7

    申请日：2020-07-15

    Applicant: Hengdian Group DMEGC Magnetics Co. Ltd.

    Inventor： LYU, Donghua

    IPC: C04B35/38 ,  C04B35/64 ,  H01F41/02

    Abstract: The present invention discloses a method for improving the Bs of an MnZn power ferrite material by moving the valley point, and relates to the field of preparation of MnZn power ferrite materials, including the following steps: 1) mixing Fe 2 O 3 , MnO and ZnO, and performing primary sanding; 2) adding glue, performing spraying and granulating, and then performing pre-sintering to obtain a pre-sintered material; 3) adding additives to the pre-sintered material, and performing secondary sanding; and 4) adding glue to the secondary sanded material, performing spraying and granulating, pressing into a standard ring, and then performing sintering. The present invention controls and moves the valley point, reduces loss and improves the Bs of a material by controlling the Fe 2 O 3 content and the Co 2 O 3 content, so that the problem in the prior art that it is impossible to simultaneously move the valley point, reduce the loss and improve the Bs of the material is solved, and the method of the present invention is relatively simple and suitable for industrialization.

    MnZn FERRITE AND METHOD FOR PRODUCING SAME
    67.
    发明公开
    MnZn FERRITE AND METHOD FOR PRODUCING SAME 审中-公开

    公开(公告)号：EP3187475A4

    公开(公告)日：2018-05-30

    申请号：EP15835796

    申请日：2015-08-31

    Applicant: HITACHI METALS LTD

    Inventor： TADA TOMOYUKI ,  MIYOSHI YASUHARU ,  KOYUHARA NORIKAZU

    IPC: C04B35/38 ,  H01F1/34

    CPC classification number: H01F1/34 ,  C01G9/02 ,  C01G45/02 ,  C01G49/06 ,  H01F1/344

    Abstract: Provided are: a MnZn-based ferrite which allows to have a low magnetic core loss and to suppress a time-dependent change of magnetic property under a high-temperature environment by a control of ambient oxygen concentration and an increase of the magnetic core loss, and a method for manufacturing the same. The MnZn-based ferrite is characterized in that Fe ranges from 53.25 mol% or more to 54.00 mol% or less on the basis of Fe 2 O 3 , Zn ranges from 2.50 mol% or more to 8.50 mol% or less on the basis of ZnO and Mn is the remainder on the basis of MnO, Si ranges from more than 0.001 mass% to less than 0.02 mass% on the basis of SiO 2 , Ca ranges from more than 0.04 mass% to less than 0.4 mass% on the basis of CaCO 3 , Co is less than 0.5 mass% on the basis of Co 3 O 4 , Bi is less than 0.05 mass% on the basis of Bi 2 O 3 , Ta is less than 0.05 mass% on the basis of Ta 2 O 5 , Nb is less than 0.05 mass% on the basis of Nb 2 O 5 , Ti is less than 0.3 mass% on the basis of TiO 2 , and Sn is less than 0.3 mass% on the basis of SnO 2 , and note that the converted total amount of Ta 2 O 5 and Nb 2 O 5 is less than 0.05 mass% and the converted total amount of TiO 2 and SnO 2 is less than 0.3 mass%.

    MnZnCo-BASED FERRITE
    69.
    发明公开
    MnZnCo-BASED FERRITE 审中-公开
    MnZnCo基铁氧体

    公开(公告)号：EP2399877A1

    公开(公告)日：2011-12-28

    申请号：EP10743650.3

    申请日：2010-01-29

    Applicant: JFE Chemical Corporation

    Inventor： YOSHIDA, Hirofumi ,  NAKAMURA, Yukiko ,  GOTO, Satoshi

    IPC: C04B35/38 ,  C01G49/00 ,  H01F1/34

    CPC classification number: C01G51/006 ,  C01G49/0018 ,  C01G49/009 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/80 ,  C04B35/265 ,  C04B35/6262 ,  C04B35/62655 ,  C04B35/62675 ,  C04B35/62695 ,  C04B2235/3208 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/3418 ,  C04B2235/5409 ,  C04B2235/604 ,  C04B2235/6567 ,  C04B2235/72 ,  C04B2235/724 ,  C04B2235/726 ,  C04B2235/727 ,  C04B2235/786 ,  C04B2235/94 ,  C04B2235/95 ,  H01F1/344

    Abstract: A Mn-Zn-Co ferrite includes a basic component, sub-components, and unavoidable impurities, wherein, as the sub-components, silicon oxide (in terms of SiO 2 ): 50 to 400 mass ppm and calcium oxide (in terms of CaO): 1000 to 4000 mass ppm are added to the basic component consisting of iron oxide (in terms of Fe 2 O 3 ): 51.0 to 53.0 mol%, zinc oxide (in terms of ZnO): more than 12.0 mol% and 18.0 mol% or less, cobalt oxide (in terms of CoO): 0.04 to 0.60 mol%, and manganese oxide (in terms of MnO): balance; and amounts of phosphorus, boron, sulfur, and chlorine in the unavoidable impurities are reduced as follows, phosphorus: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm. Even when this Mn-Zn-Co ferrite is formed into a small core having an outer diameter of about 2 to 6 mm, the core has an excellent characteristic of an incremental permeability µΔ of 2000 or more continuously in a wide temperature range of -40°C to 85°C under the application of a direct-current magnetic field of 33 A/m.

    Abstract translation: Mn-Zn-Co系铁氧体包含碱成分，副成分和不可避免的杂质，作为副成分，氧化硅（换算成SiO 2）为50〜400质量ppm，氧化钙（换算成CaO ）：在由氧化铁构成的碱性成分（换算成Fe 2 O 3）中添加1000〜4000质量ppm：51.0〜53.0摩尔％，氧化锌（换算成ZnO）：超过12.0摩尔％且18.0摩尔％ ，氧化钴（以CoO换算）：0.04〜0.60摩尔％，氧化锰（换算成MnO）：余量; 并且不可避免的杂质中的磷，硼，硫和氯的量减少如下：磷：小于3质量ppm，硼：小于3质量ppm，硫：小于5质量ppm，氯：小于10 质量ppm。 即使将该Mn-Zn-Co铁氧体形成为外径为2〜6mm左右的小型铁芯，该铁心在-40℃的宽广的温度范围内连续增量导磁率μΔ为2000以上的优异特性 在施加33A / m的直流磁场的情况下为85℃至85℃。

Patent Agency Ranking