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    • 49. 发明授权
    • Method for preparing surface-modified nickel powder
    • 表面改性镍粉的制备方法
    • US06682776B2
    • 2004-01-27
    • US10318027
    • 2002-12-13
    • Takayuki ArakiTakashi Mukuno
    • Takayuki ArakiTakashi Mukuno
    • B05D700
    • C23C18/1216B22F1/02C23C18/1241C23C18/1275H01G4/0085Y10T428/2991Y10T428/2993
    • Herein disclosed is surface-modified nickel fine powder in which a precursor of barium titanate having a perovskite structure and consisting of a reaction product of a soluble titanium-containing compound and a soluble barium-containing compound is adhered to the surface of individual nickel fine particles, wherein the fine powder shows X-ray diffraction peaks of nickel and is free of any peak of barium titanate having a perovskite structure in the X-ray diffraction pattern determined by the X-ray diffraction method, but the fine powder shows X-ray diffraction peaks of both nickel and barium titanate having a perovskite structure in the X-ray diffraction pattern after the fine powder is subjected to a heat-treatment at a temperature of not less than 400° C. The nickel fine powder has a small heat shrinkage factor upon firing and improved resistance to oxidation. The powder permits the inhibition of any such phenomenon that nickel is oxidized and the oxidized nickel penetrates into a ceramic dielectric material during firing. The powder is suitable for use as a material for a conductive paste and, in particular, for forming a conductive paste used in making a multilayer ceramic capacitor.
    • 本文公开了表面改性的镍细粉末,其中具有钙钛矿结构的钛酸钡的前体由可溶性含钛化合物和可溶性含钡化合物的反应产物组成,附着在单个镍微粒表面 其中,细粉末显示镍的X射线衍射峰,并且在通过X射线衍射法确定的X射线衍射图中没有具有钙钛矿结构的钛酸钡的任何峰,但是细粉末显示X射线 在微细粉末在不低于400℃的温度下进行热处理之后,X射线衍射图中具有钙钛矿结构的钛酸镍和钛酸钡的衍射峰均为不低于400℃。镍微粉末的热收缩率小 烧制时的因素和耐氧化性。 该粉末允许抑制镍在氧化时被氧化并且在烧制过程中氧化的镍渗透到陶瓷电介质材料中的这种现象。 该粉末适合用作导电浆料的材料,特别是用于形成用于制造多层陶瓷电容器的导电浆料。