Grayish-black encapsulated pigments and method of their production
    5.
    发明授权
    Grayish-black encapsulated pigments and method of their production 失效
    灰黑色胶囊颜料及其制作方法

    公开(公告)号:US5008223A

    公开(公告)日:1991-04-16

    申请号:US487295

    申请日:1990-03-02

    摘要: The grayish-black encapsulated pigments contain carbon black particles with specific surface areas of 10 to 1000 m.sup.2 /g (BET) encapsulated in colorless crystals of zirconium silicate. In order to produce the pigments, mixtures of zirconium oxide with a particle size distribution (D50 values) between 7 and 10 .mu.m and a spec. surface between 2 and 4 m.sup.2 /g, silicon oxide, carbon black and mineralizers are heated under reducing conditions to 900.degree. to 1400.degree. C. and calcined for 0.5 to 8 hours and recalcined under oxidizing conditions to remove the non-included carbon black. The encapsulated pigments of the invention are suitable for the pigmented coloration of glazes.

    摘要翻译: 灰黑色胶囊状颜料含有炭黑颗粒,其表面积为10至1000m2 / g(BET),其包封在无色硅酸锆晶体中。 为了制备颜料,氧化锆的混合物的粒度分布(D50值)在7和10μm之间, 表面积为2〜4m2 / g,氧化硅,炭黑和矿化剂在还原条件下加热至900〜1400℃,煅烧0.5〜8小时,在氧化条件下重新煅烧,除去未包含的炭黑。 本发明的胶囊化颜料适用于釉料着色着色。