利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.034 秒)

    Magnetic powder, method for producing the same and use of the same
    1.
    发明授权
    Magnetic powder, method for producing the same and use of the same 失效
    磁粉，其制造方法及其用途

    公开(公告)号：US5648160A

    公开(公告)日：1997-07-15

    申请号：US557174

    申请日：1996-03-14

    申请人： Mikio Kishimoto ,  Shinichi Kitahata ,  Hisao Kanzaki ,  Noriaki Ohtani ,  Toshinobu Sueyoshi

    发明人： Mikio Kishimoto ,  Shinichi Kitahata ,  Hisao Kanzaki ,  Noriaki Ohtani ,  Toshinobu Sueyoshi

    IPC分类号： G06K19/02 ,  G11B5/706 ,  G11B5/716 ,  H01F1/047 ,  H01F1/06

    CPC分类号： H01F1/047 ,  G06K19/02 ,  G11B5/70605 ,  G11B5/70626 ,  G11B5/716 ,  H01F1/06 ,  H01F1/061 ,  Y10S283/904 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： A magnetic powder containing MnBi, in which an average particle size of the magnetic powder is from 0.1 .mu.m to 20 .mu.m; a coercive force is from 3000 to 15,000 Oe at 300 K. and 50 to 1000 Oe at 80 K. when measured with applying a magnetic field of 16 KOe; an amount of magnetization is from 20 emu/g to 60 emu/g when measured at 300 K. with applying a magnetic field of 16 KOe; a degree of decrease of an amount of magnetization is 40% or less after being maintained in an atmosphere of 60.degree. C. and 90% RH for 7 days; and a content of metal bismuth (Bi) satisfies the following equation: Metal Bi/(MnBi+metal Bi)

    摘要翻译： PCT No.PCT / JP95 / 00731 Sec。 371日期：1996年3月14日 102（e）1996年3月14日PCT PCT 1995年4月14日PCT公布。 WO95 / 28718 PCT公开号 日期：1995年10月26日磁体粉末的平均粒径为0.1μm〜20μm的含有MnBi的磁性粉末; 当采用16KOe的磁场测量时，矫顽力在300K时为3000至15,000Oe，在80K时为50至1000Oe; 当在300K下测量时，磁化强度为20emu / g至60emu / g，施加16KOe的磁场; 在60℃和90％RH的气氛中保持7天后，磁化强度的降低程度为40％以下。 金属铋（Bi）的含量满足下式：金属Bi /（MnBi +金属Bi）<0.5，其中“金属Bi”是指在X射线衍射图中分配给（012）面的峰面积 Bi，MnBi表示在MnBi的X射线衍射图中分配给（101）面的峰面积，该磁粉具有优异的耐腐蚀性，并且饱和磁化强度非常小，并且具有磁性 可以防止记录数据改变的记录介质。

    Process for producing alloy, alloy and alloy containing sheets made therefrom
    2.
    发明授权
    Process for producing alloy, alloy and alloy containing sheets made therefrom 失效
    用于制造由其制成的合金，合金和合金的片材的方法

    公开(公告)号：US06143096A

    公开(公告)日：2000-11-07

    申请号：US812944

    申请日：1997-03-04

    申请人： Shinichi Kitahata ,  Hisao Kanzaki

    发明人： Shinichi Kitahata ,  Hisao Kanzaki

    IPC分类号： G06K19/06 ,  G11B5/706 ,  H01F1/00

    CPC分类号： H01F1/0027 ,  G06K19/06196 ,  G11B5/70605

    摘要： A powdery alloy mainly composed of Mn--Bi having particle diameter of 5 .mu.m or less which has a magnetic anisotropy of 6000 Oe or more in coercive force and 35 emu/g or more in saturation magnetization, wherein the size of crystallite according to Scheler's formula is 700 .ANG. or less; and an alloy containing sheet of 0.5 to 10 .mu.m thickness in which a powdery alloy mainly composed of Mn--Bi having particle diameter of 5 .mu.m or less which has a magnetic anisotropy of 6000 Oe or more in coercive force and 35 emu/g or more in saturation magnetization is bound with a binder into a sheet of 0.5 to 10 .mu.m thickness in a state magnetically oriented toward said direction of magnetic anisotropy, wherein when said sheet is measured toward said magnetic anisotropy direction at 16 kOe and 5 kOe, the ratio of residual magnetic flux density Mr16k and Mr5k (Mr5k/Mr16k) is 0.85 or more.

    摘要翻译： 主要由粒径5μm以下的Mn-Bi构成的粉末状合金，矫顽磁力各向异性为6000Oe以上，饱和磁化强度为35emu / g以上，其中，Scheler's 公式为700 ANGSTROM以下; 以及厚度为0.5〜10μm的含有合金的片材，其中主要由粒径为5μm以下的Mn-Bi构成的粉末状合金，其矫顽磁力各向异性为6000Oe以上，35emu / g 或更多的饱和磁化强度与粘结剂结合成在磁性方向朝向所述磁各向异性方向磁性取向的状态下为0.5至10μm厚的片材，其中当所述片材以16kOe和5kOe朝向所述磁各向异性方向测量时， 剩余磁通密度Mr16k和Mr5k（Mr5k / Mr16k）的比率为0.85以上。

    Magnetic recording medium
    3.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4770933A

    公开(公告)日：1988-09-13

    申请号：US142685

    申请日：1988-01-11

    申请人： Shinichi Kitahata ,  Mikio Kishimoto

    发明人： Shinichi Kitahata ,  Mikio Kishimoto

    IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/70

    CPC分类号： G11B5/70678 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/2982

    摘要： A magnetic recording medium which comprises a substrate and a magnetic layer comprising hexagonal system ferrite powder of the formula:AO.multidot.n{[Fe.sub.1-(x+y) .multidot.M.sup.2+.sub.x .multidot.M.sup.4+.sub.y ].sub.2 O.sub.3 } (I)wherein,A is at least one metal selected from the group consisting of Ba, Sr, Pb and Ca,M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mn, Co, Ni, Cu, Zn and Mg,M.sup.4+ is at least one tetravalent metal ion selected from the group consisting of Ti, Zr, Sn, Ge, V and Nb,n is a number of 3 to 8,x and y are such numbers that x+y is from 0.02 to 0.3 and x/y is from 0.2 to 0.8.,and which has a temperature dependency such that the coercive force of the magnetic layer is at a minimum in the temperature range of -20.degree. to 50.degree. C. and has a higher coercive force outside said temperature rangehas good storage property.

    摘要翻译： 一种磁记录介质，包括基底和磁性层，所述磁性层包含以下结构的六方晶系铁氧体粉末：AOxn {[Fe1-（x + y）xM2 + xxM4 + y] 2O3}（I）其中，A为至少一种金属 选自由Ba，Sr，Pb和Ca组成的组，M2 +为选自Mn，Co，Ni，Cu，Zn和Mg中的至少一种二价金属离子，M4 +为选自以下的四价金属离子 由Ti，Zr，Sn，Ge，V和Nb组成的组，n为3〜8的数，x和y为x + y为0.02〜0.3，x / y为0.2〜0.8的数。 并且具有温度依赖性，使得磁性层的矫顽力在-20℃至50℃的温度范围内处于最小值，并且在所述温度范围外具有较高的矫顽力具有良好的储存性能。

    Magnetic recording medium
    5.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4705718A

    公开(公告)日：1987-11-10

    申请号：US802386

    申请日：1985-11-27

    申请人： Shinichi Kitahata ,  Mikio Kishimoto

    发明人： Shinichi Kitahata ,  Mikio Kishimoto

    IPC分类号： C01G49/00 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/10 ,  G11B5/70

    CPC分类号： G11B5/70678 ,  Y10S428/90 ,  Y10T428/25

    摘要： A magnetic recording medium suitable for high density recording comprising a substrate and a magnetic layer wherein the magnetic layer comprises a binder resin and ferrite magnetic powder comprising hexagonal system plate particles having such magnetic anisotropy that a magnetic anisotropy constant K.sub.1 corresponding to the vertical magnetic component and a magnetic anisotropy constant K.sub.2 corresponding to the horizontal magnetic component, both derived from Fourier analysis of a magnetic torque curve measured in a plane including the C axis of the hexagonal system, satisfy following equations:0.5 0,The magnetic recording medium is suitable for use in high density recording.

    摘要翻译： 一种适用于高密度记录的磁记录介质，包括基底和磁性层，其中磁性层包括粘合剂树脂和铁氧体磁性粉末，其包含具有这样的磁各向异性的六方晶系板状颗粒，即与垂直磁性成分对应的磁各向异性常数K1和 对应于水平磁分量的磁各向异性常数K2都是从包含六边形系统的C轴的平面中测得的磁力矩曲线的傅里叶分析得出的满足下列等式：0.5 0 磁记录介质适用于高密度记录。

    Wave absorber
    8.
    发明授权
    Wave absorber 失效
    波浪吸收器

    公开(公告)号：US5952953A

    公开(公告)日：1999-09-14

    申请号：US41729

    申请日：1998-03-13

    申请人： Yoshio Nikawa ,  Masaru Chino ,  Shinichi Kitahata ,  Keiko Kurata

    发明人： Yoshio Nikawa ,  Masaru Chino ,  Shinichi Kitahata ,  Keiko Kurata

    IPC分类号： H01Q17/00

    CPC分类号： H01Q17/007 ,  H01Q17/004

    摘要： A wave absorber which is light in weight, rich in flexibility and excellent in wave absorption characteristics in a microwave frequency range. The wave absorber in which composite carbon black particles including crystalline graphite and amorphous carbon black are dispersed into an insulating matrix. In the wave absorber, dispersion of the composite carbon black particles is adjusted so that a ratio (.rho./R) of a volume resistivity .rho. measured at frequencies of 30, 100 and 500 kHz to a measured DC volume resistivity R is in a predetermined range and a volume ratio of the composite carbon black particles having particle diameters of 10 nm to 200 nm to all the composite carbon black particles is in a range of 5% to 95%. Thereby, a wave absorber excellent in absorption characteristics is obtained.

    摘要翻译： 一种重量轻，在微波频率范围内灵活性高，波吸收特性优异的吸波体。 其中包括结晶石墨和无定形炭黑的复合炭黑颗粒分散在绝缘基体中的波吸收体。 在波吸收体中，调整复合炭黑粒子的分散，使得以30,100和500kHz的频率测量的体积电阻率rho与测量的DC体积电阻率R的比（rho / R）在预定范围内 粒径为10nm〜200nm的复合炭黑粒子与所有复合炭黑粒子的体积比为5〜95％的范围。 由此，得到吸收特性优异的波长吸收体。