PREPARATION AND CHARACTERIZATION OF SILICA GEL POWDERS

来源期刊：中南大学学报(英文版)1998年第1期

论文作者：Li Zhonjun Zhao Qinsheng Liu Changrang Wang Yuntao

文章页码：32 - 35

Key words：sol-gel process; water glass; silica gel; powder preparation

Abstract: Silica gel powders , with particle diameter in the range 1 0 to 2 0 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.