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    • 4. 发明授权
    • Process for the production of coated particles
    • 生产涂层颗粒的方法
    • US06194069B1
    • 2001-02-27
    • US09363398
    • 1999-07-29
    • Tatsuhiko AdachiKazuhiko SakaiNorihiro NakayamaKenichi FujinoHidekazu Takagi
    • Tatsuhiko AdachiKazuhiko SakaiNorihiro NakayamaKenichi FujinoHidekazu Takagi
    • B32B516
    • B01J2/003G02F1/1339Y10T428/2991Y10T428/2993
    • A process for the production of insulator-coated black particles, which comprises the steps of (1-a) dispersing particles of silica or a metal oxide in an alcohol-based solvent consisting mainly of an intermediate alcohol to obtain a dispersion of the above particles, (1-c) forming a titanium oxide coating of TiO2 on the surface of each of the particles whose surfaces have been activated in the above step, to obtain titanium oxide-coated particles, (1-d) calcining the titanium oxide-coated particles obtained in the above step in a reducing and/or nitriding atmosphere and thereby blackening the above titanium oxide coatings to obtain black particles, and (1-e) forming an electrical insulator coating on a surface of each of the black particles obtained in the above step, to obtain insulator-coated black particles; characerized in that the process includes a step of (1-b) adding an alkaline aqueous solution to the dispersion obtained instep (1-a) to activate a surface of each of the particles of a metal oxide.
    • 一种制备绝缘体涂覆的黑色颗粒的方法,其包括以下步骤:(1-a)将二氧化硅或金属氧化物的颗粒分散在主要由中间体醇组成的醇基溶剂中以获得上述颗粒的分散体 ,(1-c)在上述步骤中已经活化表面的每个颗粒的表面上形成TiO 2的氧化钛涂层,以获得氧化钛涂覆的颗粒(1-d),煅烧氧化钛涂覆 在上述步骤中获得的颗粒在还原和/或氮化气氛中,从而使上述氧化钛涂层变黑以获得黑色颗粒,和(1-e)在每个黑色颗粒的表面上形成电绝缘体涂层 上述步骤,获得绝缘体涂覆的黑色颗粒; 其特征在于,该方法包括(a-b)将碱性水溶液加入到所得到的分散体(1-a)中以活化金属氧化物的每个颗粒的表面的步骤。