摘要
以氢氟酸(HF)为催化剂,采用常压干燥法制备了二氧化硅干凝胶,分析了催化剂和干燥条件对干凝胶的影响。通过DTA-TG,IR,BET等测试手段对经热处理的二氧化硅干凝胶的性能进行了研究。结果表明:试样具有纳米多孔结构,并且通过改变干燥方法对比表面积和孔隙率的可提高程度很大。
The silica xerogels were synthesized by ambient pressure drying method with hydrofluoric acid（HF） as catalyzer. The influence of catalyzer and drying method on the xerogels were analyzed. The performance of heat treated silica xerogels were investigated by means of DTA-TG, IR, BET. The results showed that the samples were porous and nano-sized structure, and the degree of specific surface area and porosity could be greatly increased by changing drying methods.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2005年第12期13-16,共4页
Journal of Materials Engineering
基金
国家高技术研究发展计划资助项目(2003AA763020)
关键词
二氧化硅干凝胶
制备
孔结构
silica xerogel
preparation
pore structure
