SPHERICAL TUNGSTEN DISULFIDE POWDER
    216.
    发明申请
    SPHERICAL TUNGSTEN DISULFIDE POWDER 审中-公开
    球形粉末灭火粉

    公开(公告)号:WO2004055228A2

    公开(公告)日:2004-07-01

    申请号:PCT/US0325899

    申请日:2003-08-20

    Abstract: A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750 °C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.

    Abstract translation: 通过在空气中依次处理偏钨酸铵的喷雾干燥粉末并将所得到的三氧化钨硫化,制备由平均粒径为约5至约50微米的二硫化钨的大球形颗粒组成的二硫化钨粉末 在约750℃下含二硫化碳的气氛。 二硫化钨粉末也可以形成为具有大球形颗粒的双峰粒度分布和较小的分散的微米至亚微米尺寸的细颗粒。

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