同济大学学报（自然科学版）2000，Vol.28Issue(5)：575-578,4.
亚临界干燥制备Sio2气凝胶
Sio2 Aerogels Dried at Subcritical Condition
摘要
Abstract
Crack- free SiO2 aerogels are repeatedly obtained at subcritical condition dried with iso- butanol. The microstructure and properties of the silic aerogel are measured by using pore size distribution, SEM and BET techniques. The results show that the SiO2 aerogels prepared at subcritical condition have nano microstructure (mean particle size: 10 nm; mean pore radius: 14.5 nm)and large specific suface area (about 708.3 m2·g-1), which are similar with SiO2 aerogels prepared at supercritical condition. Because of the significant reduction of drying pressure from 6.4 MPa to 2.3 MPa, the manufactory price of the silic aerogels can be reduced and so it is more suitable for its large scale production and application.关键词
亚临界干燥/溶胶-凝胶/SiO2气凝胶/纳米网络结构Key words
subcritical drying/sol- gel/SiO2 aerogel/nanoporous microstructure分类
化学化工引用本文复制引用
魏建东,邓忠生,薛小松,王珏..亚临界干燥制备Sio2气凝胶[J].同济大学学报（自然科学版）,2000,28(5):575-578,4.基金项目
上海市启明星跟踪计划资助项目(98QMEl406) （98QMEl406）
