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公开(公告)号:US6099792A
公开(公告)日:2000-08-08
申请号:US234738
申请日:1999-01-21
Applicant: Rahul Ganguli , Fikret Kirkbir , Douglas Meyers
Inventor: Rahul Ganguli , Fikret Kirkbir , Douglas Meyers
IPC: C03B8/02 , B01J3/00 , C01B13/32 , C01B33/152 , C01B33/158 , C01B33/16 , C01F7/02 , C01G17/02 , C01G19/02 , C01G21/02 , C01G23/053 , C01G25/02 , C01G30/00 , C03C1/00 , C03C3/06 , C04B35/111 , C04B35/14 , C04B35/46 , C04B35/622 , C04B35/624 , C04B38/00
CPC classification number: C04B35/62655 , B22C1/183 , C01B33/1585 , C01B33/163 , C03C1/006 , C03C3/06 , C04B35/111 , C04B35/14 , C04B35/46 , C04B35/624 , C04B35/62605 , C03C2201/31 , C03C2201/3476 , C03C2203/26 , C04B2235/3224 , C04B2235/3287
Abstract: A sol-gel process for producing dry porous gel monoliths, e.g., silica glass monoliths, in which the successive process steps of gelling, aging and drying all occur within a mold formed of a porous material, e.g., graphite. The mold is inert to the gel solution and it has sufficient strength to withstand the temperatures and pressures encountered during the process, yet it has sufficient porosity to facilitate the escape of liquid from the gel pores directly through the mold, itself. The mold and gel thereby can remain within a sealed autoclave during these process steps, and mechanical handling of the mold and the gel are minimized. This substantially enhances the process' efficiency. Alternatively, the mold can have a non-porous inner skin.
Abstract translation: 用于生产干多孔凝胶整料(例如石英玻璃整料)的溶胶 - 凝胶方法,其中连续的胶凝,老化和干燥的工艺步骤全部发生在由多孔材料例如石墨形成的模具内。 模具对凝胶溶液是惰性的,并且其具有足够的强度以承受在该过程中遇到的温度和压力,但是其具有足够的孔隙率以便于液体从凝胶孔直接通过模具自身逸出。 因此,在这些工艺步骤期间,模具和凝胶可以保持在密封的高压釜内,并且模具和凝胶的机械处理最小化。 这大大提高了工艺的效率。 或者,模具可以具有无孔内皮。