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    Ferrite material and method for producing ferrite material
    1.
    发明申请
    Ferrite material and method for producing ferrite material 有权
    铁氧体材料及其制造方法

    公开(公告)号：US20090057606A1

    公开(公告)日：2009-03-05

    申请号：US12230488

    申请日：2008-08-29

    Applicant: Tomoyuki Tada ,  Yasuharu Miyoshi ,  Takeshi Yanagihara

    Inventor： Tomoyuki Tada ,  Yasuharu Miyoshi ,  Takeshi Yanagihara

    IPC: C04B35/36

    CPC classification number: C04B35/2616 ,  C04B35/265 ,  C04B2235/3203 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/528 ,  C04B2235/5436 ,  C04B2235/6585 ,  C04B2235/95 ,  H01F1/344 ,  H01F1/37 ,  H01F41/0246 ,  H01Q7/06 ,  H01Q7/08

    Abstract: The invention provides a ferrite material (ferrite sintered body, ferrite powders) having a composition formula of (1−x−y−z)(Li0.5Fe0.5)O.xZnO.y(Mn, Fe)2O3.zCuO, wherein x, y, z, and a satisfy 0.175≦x≦0.29; 0.475≦y≦0.51; 0.07≦z≦0.22; and 0.02≦a≦0.055 in a case of a=Mn/(Mn+Fe). At least one of Co oxide, Co hydroxide, and Co carbonate in an amount of 1 wt. % or less on the basis of CoO may be contained in 100 wt % of the ferrite material. The ferrite material has a normalized impedance ZN of 40000 Ω/m or more at 30 MHz and a normalized impedance ZN of 60000 Ω/m or more at 100 MHz as well as a specific resistance of 106 Ωm or more.

    Abstract translation: 本发明提供组成式为（1-xyz）（Li0.5Fe0.5）O.xZnO.y（Mn，Fe）2O3.zCuO的铁氧体材料（铁氧体烧结体，铁氧体粉末），其中x，y， z，a满足0.175 <= x <= 0.29; 0.475 <= y <= 0.51; 0.07 <= z <= 0.22; 在a = Mn /（Mn + Fe）的情况下，0.02 <= a <= 0.055。 钴氧化物，Co氢氧化物和碳酸钙中的至少一种为1重量％ 基于CoO的％以下可以含有100重量％的铁氧体材料。 铁氧体材料在30MHz时的归一化阻抗ZN为40000Ω/ m以上，在100MHz下的归一化阻抗ZN为60000Ω/ m以上，电阻率为10ΩΩ以上。

    Ferrimagnetic glass-ceramics
    2.
    发明授权
    Ferrimagnetic glass-ceramics 失效
    FERRIMAGNETIC GLASS-CERAMICS

    公开(公告)号：US3694360A

    公开(公告)日：1972-09-26

    申请号：US3694360D

    申请日：1971-08-12

    Applicant: OWENS ILLINOIS INC

    Inventor： WEAVER EDWARD A

    IPC: C03C10/00 ,  C04B35/26 ,  C03C3/04

    CPC classification number: C04B35/2691 ,  C03C10/0081 ,  C04B35/2616 ,  Y10S264/58

    Abstract: FERRIMAGNETIC GLASS-CERAMICS PREPARED FROM THERMALLY AND SPONTANEOUSLY CRYSTALLIZABLE COMPOSITIONS BASED ON A SIMPLE TERNARY GLASS SYSTEM FE2O3-LI2O-SIO2, WHEREIN THE PREDOMINANT CRYSTALLINE PHASE IS LITHIUM FERRITE (LIFE5O8). THE ADDITION OF MINOR AMOUNTS OF MODIFIERS OR NUCLEANTS, SUCH AS ZNO, TO THE BASIC TERNARY COMPOSITION OF THIS INVENTION PROVIDES A GREATER DEGREE OF CONTROL OVER THE CRYSTALLIZATION OF THE THERMALLY CRYSTALLIZABLE COMPOSITIONS AND FURTHER ENHANCES THE DEVELOPMENT AND GROWTH OF FERRITE CRYSTALS AND THE MAGNETIC PROPERTIES OF THE FERRITES. THE GLASS-CERAMICS PREPARED FROM THE SIMPLE GASS SYSTEMS AND BY THE METHODS OF THIS INVENTION HAVE MAGNETIC PROPERTIES WHICH MAKE THEM USEFUL IN THE MANUFACTURE OF COMPUTER MEMORY CORES, RADIO COILS, PULSE TRANSFORMERS AND OTHER ASSORTED ELECTRONIC DEVICES WHICH ARE DESIGNED TO OPERATE AT MICROWAVE FREQUENCIES.

    Lithium-zinc ferrite composition with arsenic oxide or bismuth oxide additive
    3.
    发明授权
    Lithium-zinc ferrite composition with arsenic oxide or bismuth oxide additive 失效
    含氧化锡或氧化铝添加剂的锂锌铁素体组合物

    公开(公告)号：US3640867A

    公开(公告)日：1972-02-08

    申请号：US3640867D

    申请日：1969-05-07

    Applicant: HITACHI LTD

    Inventor： IIMURA TSUTOMU ,  KUROKAWA SUSUMU ,  EMOTO MASAYUKI

    IPC: C04B35/26

    CPC classification number: C04B35/2616

    Abstract: A lithium-zinc ferrite composition most suitable for use as magnetic memory cores in high-speed electronic computer, which consists of 10 to 30 mol percent of Li20, 3.5 to 20 mol percent of Zn0 and 70 to 85 mol percent of Fe203 as the main components; and in addition at least one metal oxide selected from the group consisting of vanadium oxide, arsenic oxide and bismuth oxide as subcomponents, the content of the metal oxide being 0.01 to 1 percent by weight with respect to the main components.

    Abstract translation: 最适合用作高速电子计算机磁记录芯的锂锌铁氧体组合物，其组成为10〜30mol％的Li 2 O，3.5〜20mol％的ZnO和70〜85mol％的Fe 2 O 3为主 组件; 另外，选自氧化钒，氧化砷和氧化铋作为副成分的至少一种金属氧化物，相对于主要成分，金属氧化物的含量为0.01〜1重量％。

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