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    • 43. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US07090936B2
    • 2006-08-15
    • US10397845
    • 2003-03-27
    • Kenichi KitamuraTakayoshi KuwajimaSadafumi Iijima
    • Kenichi KitamuraTakayoshi KuwajimaSadafumi Iijima
    • G11B5/738
    • G11B5/738G11B5/7026
    • The present invention provides a high recording density magnetic recording medium with excellent surface smoothness, as well as excellent electromagnetic conversion characteristics and durability. A magnetic recording medium comprising a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on a non-magnetic support, and an upper magnetic layer with a thickness of 0.2 μm or less on said lower non-magnetic layer, wherein said lower non-magnetic layer contains an acicular powder of hydrated iron oxide as the non-magnetic powder, and said lower non-magnetic layer contains a fatty acid and a fatty acid amide. Preferably the acicular powder of hydrated iron oxide is goethite with an average long axial length of 0.15 μm or less.
    • 本发明提供了具有优异的表面光滑度以及优异的电磁转换特性和耐久性的高记录密度磁记录介质。 一种磁记录介质,包括在非磁性载体上至少包含非磁性粉末和粘合剂树脂的下部非磁性层,以及在所述下部非磁性层上具有0.2μm或更小的厚度的上部磁性层 其中所述下部非磁性层含有作为非磁性粉末的水合氧化铁的针状粉末,所述下部非磁性层含有脂肪酸和脂肪酸酰胺。 优选地,水合氧化铁的针状粉末是具有0.15μm或更小的平均长轴向长度的针铁矿。
    • 45. 发明授权
    • Negative electrode material for non-aqueous liquid electrolyte secondary
cell, method for producing same and non-aqueous liquid electrolyte
secondary cell employing same
    • 非水电解液二次电池用负极材料及其制造方法以及使用其的非水电解液二次电池
    • US5972536A
    • 1999-10-26
    • US52503
    • 1998-03-31
    • Shinichiro YamadaHiroyuki AkashiHiroshi ImotoHideto AzumaKenichi KitamuraMomoe AdachiTerue SasakiKohichi Tanaka
    • Shinichiro YamadaHiroyuki AkashiHiroshi ImotoHideto AzumaKenichi KitamuraMomoe AdachiTerue SasakiKohichi Tanaka
    • H01M4/133H01M4/587H01M4/60
    • H01M4/583H01M10/0525
    • A negative electrode material for a secondary cell for anon-aqueous liquid electrolyte for realizing a high charging/discharging capacity and a high discharging efficiency, a method for producing such material and a non-aqueous liquid electrolyte secondary cell employing such material. The negative electrode material contains at least one carbonaceous material selected from the group consisting of coffee beans, tea leaves, cane sugar, corns, fruits, straws of cereals and husks of cereals, a carbonaceous material derived from a plant-origin high molecular material containing a sum total of 0.2 to 20 wt % of metal elements, phosphorus and sulphur calculated as elements or a carbonaceous material having a diffraction peak between 30.degree. and 32.degree. of the 2.theta. diffraction angle in the X-ray (CuK.alpha.) powder diffraction pattern. For producing the negative electrode material, at least one carbonaceous material selected from the group consisting of coffee beans, tea leaves, cane sugar, corns, fruits, straws of cereals and husks of cereals, or crystalline or fibrous cellulose admixed with at least one of metal elements, phosphorus or sulphur, is sintered for carbonization. The negative electrode material is used for a non-aqueous liquid electrolyte secondary cell having a positive electrode formed of a lithium compound oxide and a negative electrode formed of a carbonaceous negative electrode material capable of doping and dedoping lithium ions as an active negative electrode material.
    • 用于实现高充电/放电容量和高放电效率的用于非水电解液的二次电池的负极材料,这种材料的制造方法和使用这种材料的非水电解液二次电池。 负极材料含有至少一种选自咖啡豆,茶叶,蔗糖,玉米,水果,谷物和谷类的谷物的碳质材料,衍生自植物来源的高分子材料的含碳材料含有 在X射线(CuKα)粉末衍射中,作为元素计算的金属元素总计为0.2〜20重量%,作为元素计算的磷和硫,或衍射峰为30度〜32度的2θ衍射角的碳质材料 模式。 为了生产负极材料,选自咖啡豆,茶叶,蔗糖,玉米,水果,麦片和麦片的至少一种碳质材料或与以下中的至少一种混合的结晶或纤维状纤维素 金属元素,磷或硫,被烧结以进行碳化。 负极材料用于具有由锂复合氧化物形成的正极和由能够掺杂和去掺杂锂离子的碳质负极材料形成的负极作为活性负极材料的非水电解质二次电池。