Synthesis of microporous ceramics
    9.
    发明授权
    Synthesis of microporous ceramics 失效
    微孔陶瓷的合成

    公开(公告)号:US5563212A

    公开(公告)日:1996-10-08

    申请号:US248291

    申请日:1994-05-24

    IPC分类号: C04B38/06 C04B38/00 C04B35/52

    CPC分类号: C04B38/0022

    摘要: The present invention provides for microporous ceramic materials having a surface area in excess of 50 m.sup.2 /gm and an open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.015 cm.sup.3 /gm of the ceramic. The invention also provides for a preceramic composite intermediate composition comprising a mixture of a ceramic precursor and finely divided particles comprising a non-silicon containing ceramic, carbon, or an inorganic compound having a decomposition temperature in excess of 400.degree. C., whose pyrolysis product in inert atmosphere or in an ammonia atmosphere at temperatures of up to less than about 1100.degree. C. gives rise to the microporous ceramics of the invention. Also provided is a process for the preparation of the microporous ceramics of the invention involving pyrolysis of the ceramic intermediate under controlled conditions of heating up to temperatures of less than 1100.degree. C. to form a microporous ceramic product.

    摘要翻译: 本发明提供了具有超过50m 2 / gm的表面积的微孔陶瓷材料和开孔的微孔孔结构,其中微孔具有小于20埃的平均宽度,并且其中所述微孔结构包括大于约0.015的体积 cm3 / gm的陶瓷。 本发明还提供一种预陶瓷复合中间体组合物,其包含陶瓷前体和包含非硅含量陶瓷,碳或分解温度超过400℃的无机化合物的细碎颗粒的混合物,其热分解产物 在惰性气氛中或在高达少于约1100℃的氨气氛中,产生本发明的微孔陶瓷。 还提供了制备本发明的微孔陶瓷的方法,其包括在加热至低于1100℃的温度的受控条件下陶瓷中间体的热解,以形成微孔陶瓷产品。