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    Member for supporting magnetic disc substrates, process of producing the same, and magnetic disc device using the same
    12.
    发明授权
    Member for supporting magnetic disc substrates, process of producing the same, and magnetic disc device using the same 有权
    用于支持磁盘基板的部件，其制造方法以及使用其的磁盘装置

    公开(公告)号：US07179550B2

    公开(公告)日：2007-02-20

    申请号：US10401513

    申请日：2003-03-28

    申请人： Masahiro Okumura ,  Tetsuzi Hayasaki

    发明人： Masahiro Okumura ,  Tetsuzi Hayasaki

    IPC分类号： B32B3/02 ,  B11B5/706 ,  C04B35/32

    CPC分类号： G11B17/02 ,  G11B17/038

    摘要： A member of supporting magnetic disc substrates is provided, comprising a ceramic sinter containing a ceramic component and at least one conductive component selected from a group consisting of iron, niobium, tin zinc, copper, nickel, cobalt, and chromium, wherein the ceramic sinter has conductive aggregates on its peripheral surface. In the member, the ceramic component may be forsterite and the conductive component is iron oxide, wherein the ceramic sinter comprises a main phase of 2MgO.SiO2 and a secondary phase of at least one of MgFe2O4, Fe3O4 and Fe2O3. The ceramic sinter can be produced by a process including: sintering a ceramic sinter from a ceramic component and at least one conductive component selected from a group consisting of iron, niobium, tin zinc, copper, nickel, cobalt and chromium; machining the sinter into a desired shape of a member of supporting a magnetic disc substrate, and annealing the sinter such that the ceramic sinter has conductive aggregation deposited on its peripheral surface, wherein in the annealing step, the member is heated at a temperature in between a glass transition temperature of the sinter minus 500° C. and a softening temperature of the sinter plus 600° C.

    摘要翻译： 提供支撑磁盘基板的构件，其包括含有陶瓷组分的陶瓷烧结体和选自铁，铌，锡锌，铜，镍，钴和铬中的至少一种导电组分，其中陶瓷烧结体 在其外周表面具有导电聚集体。 在该构件中，陶瓷组分可以是镁橄榄石，导电组分是氧化铁，其中陶瓷烧结体包括2MgO.SiO 2的主相和MgFe 2 4，Fe 3 O 4和Fe 2 O 3， / SUB>。 陶瓷烧结体可以通过以下工艺生产：包括：从陶瓷部件烧结陶瓷烧结体和至少一种选自铁，铌，锡锌，铜，镍，钴和铬的导电组分; 将所述烧结体加工成支撑磁盘基板的构件的所需形状，以及使所述烧结体退火，使得所述陶瓷烧结体在其外周表面上沉积有导电聚集体，其中在所述退火步骤中，将所述构件在 烧结体的玻璃化转变温度减去500℃，烧结体的软化温度加上600℃。

    Cobalt-containing iron oxide pigments, process for producing the same and magnetic recording medium containing the same
    13.
    发明授权
    Cobalt-containing iron oxide pigments, process for producing the same and magnetic recording medium containing the same 失效
    含钴氧化铁颜料，其制造方法以及含有它的磁记录介质

    公开(公告)号：US6080233A

    公开(公告)日：2000-06-27

    申请号：US260447

    申请日：1994-06-14

    申请人： Berndt-Ullrich Kohler

    发明人： Berndt-Ullrich Kohler

    IPC分类号： C01G49/00 ,  C01G49/08 ,  C09C1/22 ,  C09C1/24 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/712 ,  H01F1/11 ,  C04B35/32

    CPC分类号： C09C1/24 ,  C01G49/08 ,  G11B5/70673 ,  G11B5/70678 ,  H01F1/11 ,  C01P2002/54 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/80 ,  Y10T428/2991

    摘要： Disclosure describes a cobalt-containing iron oxide pigments comprising:a cobalt-containing iron oxide core, the average concentration of cobalt distributed evenly in an innermost 50% by weight of the cobalt-containing iron oxide core being from 0.1 to 1.0% by weight (calculated as Co) based on iron oxide contained therein, and the content of Fe.sup.2+ in the core being from 16 to 22% by weight based on the iron oxide contained in the cobalt-containing iron oxide core; anda cobalt-containing iron oxide surface layer, the average concentration of cobalt in the surface layer of the outermost 10% by weight of the pigment being on average at least five times as high as the average concentration of cobalt in the innermost 50% by weight of the cobalt-containing iron oxide core.

    摘要翻译： 公开内容描述了一种含钴氧化铁颜料，其包含：含钴氧化铁芯，钴的平均浓度均匀分布在含钴氧化铁芯的最内部的50重量％中，为0.1至1.0重量％ 基于其中所含的氧化铁计算为Co），并且核中Fe2 +的含量基于含钴氧化铁芯中所含的氧化铁为16至22重量％; 和含钴氧化铁表面层，最外面的颜料的10重量％表面层中的钴的平均浓度平均为最里面的50％的钴的平均浓度的五倍以上 含钴氧化铁芯的重量。

    Magnetic field generator useful for a magnetic resonance imaging instrument
    15.
    发明授权
    Magnetic field generator useful for a magnetic resonance imaging instrument 失效
    用于磁共振成像仪器的磁场发生器

    公开(公告)号：US4827235A

    公开(公告)日：1989-05-02

    申请号：US73184

    申请日：1987-07-14

    申请人： Koichiro Inomata ,  Tetsuhiko Mizoguchi ,  Naoyuki Sori ,  Hideki Yamamiya ,  Isao Sakai

    发明人： Koichiro Inomata ,  Tetsuhiko Mizoguchi ,  Naoyuki Sori ,  Hideki Yamamiya ,  Isao Sakai

    IPC分类号： G01R33/383 ,  H01F7/02 ,  H01F1/24 ,  C04B35/32

    CPC分类号： G01R33/383 ,  H01F7/0278

    摘要： A magnetic field generator comprises a permanent magnet, and pole pieces magnetically connected to the permanent magnet. The pole pieces are disposed to face each other to generate a magnetic field between them, and have a specific resistance of 20 .mu..OMEGA.-cm or more. The permanent magnet comprises a sintered alloy including iron as a main component, a rare earth element including yttrium, cobalt, and boron. The permanent magnet includes, as its main part, a strong magnetic Fe-rich phase of a tetragonal system, as well as a non-magnetic Laves phase, and preferably has a maximum energy product of 38 MGOe or more.

    摘要翻译： 磁场发生器包括永磁体和与永磁体磁连接的极片。 磁极片彼此面对配置，在它们之间产生磁场，电阻值为20μΩEGEG-cm以上。 永磁体包括以铁为主要成分的烧结合金，包括钇，钴和硼的稀土元素。 永久磁铁作为其主要部分包括四方晶系的强磁铁富相以及非磁性Laves相，优选具有38MGOe以上的最大能量乘积。