摘要
基于实验 ,分析了SiO2 气凝胶在制备过程中收缩开裂的原因 ,并系统研究了原料和溶剂 (水和乙醇 )的用量及催化剂的使用、老化等因素对SiO2 气凝胶结构的影响 ,利用这些因素来实现对其进行微观结构控制 。
The causes of shrinkage cracking formed in the preparation of silica aerogels are analyzed on the basis of experiments. The factors ,such as amount of raw materials and solvent (water or ethanol) used, use of catalyst,aging etc. , influencing the structure of the silica aerogels are studied. On the basis of knowledge of these influencing factors,the shrinkage cracking problems can be solved by control of microstructure of silica aerogels and ethanol super critical drying.
出处
《河南化工》
CAS
2005年第1期9-11,共3页
Henan Chemical Industry
基金
国家 8 6 3资助项目 (2 0 0 3AA30 2 6 10 )
关键词
气凝胶
超临界干燥
结构控制
aerogels
super critical drying
structure control
