Sol-gel process for providing a tailored gel microstructure

Details Sol-gel process for providing a tailored gel microstructure Sol-gel process for providing a tailored gel microstructure

1991-12-20

1993-11-23

Lovering, Richard D.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

2523156, 501 12, B01J 1300, C01B 33158

Patent

active

052641970

ABSTRACT:
An improved sol-gel process for fabricating large, crack-free gel monoliths (e.g., of silica) is described in which a specially-tailored gel microstructure is provided by adjusting the relative concentrations of an alcohol diluent (e.g., ethanol) and/or one or more catalysts (e.g., HCl and HF). Controlled variations in the gel's average pore radius, bulk density, rupture modulus, and elastic modulus over a wide range can be tailored in this fashion. This enables the process to be optimized for the particular application involved.

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