Method for synthesizing amorphous silicon nitride
    6.
    发明授权
    Method for synthesizing amorphous silicon nitride 失效
    合成非晶氮化硅的方法

    公开(公告)号:US4416863A

    公开(公告)日:1983-11-22

    申请号:US394862

    申请日:1982-07-02

    CPC分类号: C01B21/068 C01P2002/02

    摘要: A method for synthesizing amorphous silicon nitride, wherein silicon halide and ammonia are reacted in a reaction vessel at a high temperature in the absence of oxygen to thereby synthesize powder of amorphous silicon nitride, then the powder is separated from a gas containing therein gaseous ammonia halide which has been produced simultaneously with said amorphous silicon nitride by use of a collecting means, comprises directly mixing, in advance of the separation, cool gas containing therein neither oxygen nor moisture into said gas to cool down said powder and gas so that both substances may be put in said collecting means without deposition of ammonium halide to the inner wall of the reaction vessel, and other component parts.

    摘要翻译: 一种合成非晶氮化硅的方法,其中卤化硅和氨在不存在氧的情况下在高温下在反应容器中反应,从而合成非晶氮化硅粉末,然后将粉末与其中含有气态氨化氢的气体分离 通过使用收集装置与所述无定形氮化硅同时生产的方法包括在分离之前将含有氧气或水分的冷气直接混合到所述气体中以冷却所述粉末和气体,使得两种物质可以 放入所述收集装置中而不将卤化铵沉积到反应容器的内壁和其它组分部分。

    Hardenable composition with high storage stability containing scaly silica particles and process for its production
    8.
    发明授权
    Hardenable composition with high storage stability containing scaly silica particles and process for its production 失效
    具有高储存稳定性的鳞片状二氧化硅颗粒的可硬化组合物及其生产方法

    公开(公告)号:US06764539B2

    公开(公告)日:2004-07-20

    申请号:US10099971

    申请日:2002-03-19

    IPC分类号: B01J3502

    CPC分类号: C01B33/12 Y10S516/923

    摘要: A process for producing a hardenable composition with high storage stability containing scaly silica particles which consist essentially of foliar secondary silica particles and have a laminated structure, said process comprising: (1) a step of subjecting a silica sol, a silica hydrogel or hydrous silicic acid to hydrothermal treatment in the presence of an alkali metal salt to form tertiary agglomerated particles of the scaly silica in the form of porous three-dimensional disorderly agglomerates of foliar secondary silica particles, each secondary particle being formed by a parallel face-to-face alignment of a plurality of flaky primary particles which are overlaid one on another, and (2) a step of disintegrating and dispersing the tertiary agglomerated particles of silica in an organic polymer in the form of an aqueous emulsion by a wet method.

    摘要翻译: 一种制备具有高储存稳定性的可硬化组合物的方法,其包含基本上由叶二次二氧化硅颗粒组成并具有层压结构的鳞状二氧化硅颗粒,所述方法包括:(1)将二氧化硅溶胶,二氧化硅水凝胶或含水硅酸 在碱金属盐的存在下进行酸热处理,以形成鳞片状二氧化硅的三次附聚颗粒,其形式为多孔三维无序的叶状二次二氧化硅颗粒的附聚物,每个二次颗粒由平行的面对面形成 将多个片状一次粒子重叠在一起的对准,和(2)通过湿法将水性乳液形式的二氧化硅的三级凝聚粒子分解并分散在有机聚合物中的步骤。