Pyrogenically produced silicon dioxide powder and dispersion thereof
    5.
    发明授权
    Pyrogenically produced silicon dioxide powder and dispersion thereof 有权
    热解产生的二氧化硅粉末及其分散体

    公开(公告)号:US07537833B2

    公开(公告)日:2009-05-26

    申请号:US11055605

    申请日:2005-02-11

    IPC分类号: B32B5/16

    摘要: Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 90±15 m2/g, wherein the aggregates display an average surface area of 10000 to 20000 nm2, an average equivalent circle diameter (ECD) of 90 to 130 nm and an average circumference of 1000 to 1400 nm.It is produced by a pyrogenic process in which silicon tetrachloride and a second silicon component comprising H3SiCl, H2SiCl2, HSiCl3, CH3SiCl3, (CH3)2SiCl2, (CH3)3SiCl and/or (n-C3H7)SiCl3 are mixed with primary air and a combustion gas and burnt into a reaction chamber, secondary air also being introduced into the reaction chamber, and the feed materials being chosen such that an adiabatic flame temperature of 1810 to 1890° C. is obtained.Dispersion containing the pyrogenically produced silicon dioxide powder.

    摘要翻译: 以BET表面积为90±15m 2 / g的一次粒子聚集体形式的热解法生产的二氧化硅粉末,其中聚集体的平均表面积为10000〜20000nm 2,平均当量圆直径(ECD)为90 至130nm,平均周长为1000〜1400nm。 其通过热解法制备,其中将四氯化硅和包含H3SiCl,H 2 SiCl 2,HSiCl 3,CH 3 SiCl 3,(CH 3)2 SiCl 2,(CH 3)3 SiCl和/或(n-C 3 H 7)SiCl 3的第二硅组分与一次空气和 燃烧气体并燃烧到反应室中,二次空气也被引入反应室,并且进料选择为使得获得1810至1890℃的绝热火焰温度。 含有热解产生的二氧化硅粉末的分散体。