Preparation and characterization of silica gel powders

Abstract

Silica gel powders, with particle diameter in the range 10 to 20 nm, were prepared from water glass using ethyl acetate as a latent acid reagent. The products were characterized by TG-DTA, TEM, FTIR, BET and some other experiment methods. The process of silica sol-gel formation and the thermal behavior as well as phase change of the silica powders during heat-treating process were studied, and the effect of heat-treating temperature on the specific surface area and apparent density of the silica powders was investigated.

Keywords

sol-gel process / water glass / silica gel / powder preparation

References

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