PROCESS FOR PRODUCTION OF IRON OXYHYDROXIDE PARTICLES
    41.
    发明申请
    PROCESS FOR PRODUCTION OF IRON OXYHYDROXIDE PARTICLES 失效
    生产氧化亚铁氧化物颗粒的方法

    公开(公告)号:US20090169470A1

    公开(公告)日:2009-07-02

    申请号:US12343023

    申请日:2008-12-23

    申请人: Mika KAWASE

    发明人: Mika KAWASE

    IPC分类号: C01G49/06

    摘要: The process for production of iron oxyhydroxide particles according to the invention is characterized by comprising a step (A) in which a suspension containing iron(II) is prepared, and a step (B) in which fine bubbles with diameters of 0.05-500 μm are generated in the suspension to form a reaction mixture, and the iron(II) in the reaction mixture is oxidized by the bubbles to produce iron oxyhydroxide particles.

    摘要翻译: 根据本发明的制备羟基氧化铁颗粒的方法的特征在于包括其中制备含有铁(II)的悬浮液的步骤(A)和步骤(B),其中直径为0.05-500μm的细小气泡 在悬浮液中产生以形成反应混合物,并且反应混合物中的铁(II)被气泡氧化以产生羟基氧化铁颗粒。

    Method for preparing metal oxide particles with a controlled size
    42.
    发明申请
    Method for preparing metal oxide particles with a controlled size 有权
    制备具有受控尺寸的金属氧化物颗粒的方法

    公开(公告)号:US20090162274A1

    公开(公告)日:2009-06-25

    申请号:US12317047

    申请日:2008-12-18

    摘要: A method for preparing metal oxide particles having a primary particle size on the order of nanometers is provided. The method comprises subjecting a metal ion present in an aqueous solution and an amino alcohol to an initial stage of reaction with each other at normal temperatures under normal pressures for a given time, and adding at least once either of a metal ion or an amino alcohol or both thereof to the resulting reaction system for carrying out a subsequent stage of reaction for a given time wherein total amounts of the metal ion and the amino alcohol are such that the amino alcohol is used in the range of not less than a molar equivalent to the metal ion.

    摘要翻译: 提供一种具有大约数量级的一次粒径的金属氧化物粒子的制造方法。 该方法包括在常压下在常压下给予水溶液和氨基醇中的金属离子进行初始反应,给定时间,并且至少加入金属离子或氨基醇中的任一种 或其二者连接到所得反应体系上,以进行随后的反应阶段一段给定的时间,其中金属离子和氨基醇的总量使氨基醇的使用量不小于摩尔当量 金属离子。

    Powder for underlayer of coating type magnetic recording medium and magnetic recording medium comprising the same
    45.
    发明申请
    Powder for underlayer of coating type magnetic recording medium and magnetic recording medium comprising the same 有权
    涂覆型磁记录介质的底层粉末和包含该粉末的磁记录介质

    公开(公告)号:US20050158586A1

    公开(公告)日:2005-07-21

    申请号:US10507915

    申请日:2003-04-02

    IPC分类号: C01G49/06 G11B5/738 G11B5/68

    CPC分类号: G11B5/738 Y10T428/2982

    摘要: A powder for an underlayer of a coating-type magnetic recording medium comprises acicular iron oxide particles having an average major axis length in the range of 20-200 nm, has a specific surface area measured by the BET method of 30-100 m2/g and has a powder pH of not greater than 7. The underlayer powder preferably contains 0.1-5.0 wt % of P and optionally contains an amount of R (where R represents one or more rare earth elements, defined as including Y) such that R/Fe expressed in atomic percentage (at. %) is 0.1-10 at. %. The iron oxide powder enhances the properties required of a powder for forming the underlayer of a multi-layer structure coating-type magnetic recording tape, most notably the surface smoothness and strength of the tape.

    摘要翻译: 涂覆型磁记录介质的底层粉末包括平均长轴长度在20-200nm范围内的针状氧化铁颗粒,具有通过BET法测量的比表面积为30-100μm 2 / g,粉末pH不大于7.底层粉末优选含有0.1-5.0重量%的P,并且任选地含有一定量的R(其中R表示一种或多种稀土元素,定义为 包括Y),使得以原子百分比(at。%)表示的R / Fe为0.1-10at。 % 氧化铁粉末增强了用于形成多层结构涂覆型磁记录带的底层的粉末所需的性能,最显着地是带的表面平滑度和强度。

    Powder for sublayer coating type magnetic recording medium
    46.
    发明申请
    Powder for sublayer coating type magnetic recording medium 有权
    用于亚层涂层型磁记录介质的粉末

    公开(公告)号:US20050129945A1

    公开(公告)日:2005-06-16

    申请号:US10508033

    申请日:2003-04-02

    CPC分类号: G11B5/738 Y10T428/2982

    摘要: A powder for an underlayer of a coating-type magnetic recording medium, which powder comprises flat-acicular iron oxide particles having an average major axis length of 20-200 nm, a short axis cross-section taken perpendicularly to the long axis that has a long width and a short width, and a short axis cross-section ratio defined as the ratio of the long width to the short width that is greater than 1.3 and substantially uniform in the long axis direction, the powder having a specific surface area measured by the BET method of 30-100 m2/g. The underlayer powder preferably contains 0.1-5.0 wt % of P and, optionally, an amount of R(R representing one or more rare earth elements, defined as including Y) such that R/Fe expressed in atomic percentage (at. %) is 0.1-10 at. %.

    摘要翻译: 一种用于涂层型磁记录介质底层的粉末,该粉末包含平均长轴长度为20-200nm的扁平针状氧化铁颗粒,垂直于长轴的短轴截面为 长宽度和短宽度,短轴截面比定义为长宽与短宽的比大于1.3并且在长轴方向上基本均匀,所述粉末的比表面积由 BET法为30-100m 2 / g。 底层粉末优选含有0.1-5.0重量%的P和任选的R(R表示一个或多个稀土元素,定义为包括Y)的量,使得以原子百分比(at。%)表示的R / Fe为 0.1-10 at。 %。

    Method of manufacturing aluminum-substituted hematite
    49.
    发明授权
    Method of manufacturing aluminum-substituted hematite 失效
    制备铝取代赤铁矿的方法

    公开(公告)号:US06849115B2

    公开(公告)日:2005-02-01

    申请号:US10610564

    申请日:2003-07-02

    摘要: A method of manufacturing aluminum-substituted hematite represented by α-(Fe1-xAlx)2O3 where x=0.01 to 0.15, by mixing an iron compound and an aluminum compound such that an atomic ratio of Fe to Al falls within the range of 99:1 to 85:15, adding citric acid and ethylene glycol to the mixture of the iron compound and aluminum compound to produce a gel, and pyrolyzing the gel, followed by calcining the pyrolyzed product.

    摘要翻译: 通过混合铁化合物和铝化合物,使Fe与Al的原子比落在99〜99的范围内,制造由α-(Fe1-xAlx)2O3表示的铝 - 取代赤铁矿的方法,其中X = 1至85:15,向铁化合物和铝化合物的混合物中加入柠檬酸和乙二醇以产生凝胶,并将凝胶热解,然后煅烧热解产物。