硅气凝胶研究进展.pdf

30 1 Vol130 No11 2 0 0 7 3 Journal of Changchun University of Science and T echnology Mar. 2 0 0 7 1 1 2 2 高秀霞, 张伟娜 , 任敏 , 朱果逸 ( 11 , 130022 21 , 130022) : 目前硅气凝胶是世界上最轻隔热性最好孔隙率较高 声传播速率较低的固体材料, 由于其特殊的网 络结构使其具有很多独特的性能本文从其研究历史及现状出发, 对其性能以及在不同方面的应用和制备原理 进行了综述, 并对其广阔的发展前景进行了展望 : 硅气凝胶; 溶胶 -凝胶法; 超临界干燥技术 : TQ171177 : A : 1672- 9870 ( 2007) 01- 0086- 06 P rogress in the Study of Silica A erogels 1 1 2 2 AO Xiuxia , ZHAN W eina , REN M in, ZHU uoyi ( 11School of chem istry and Environmen tal E ngineering, Changchun Un iversity of Science and Technology, Chang chun 130022; 21StateK ey Laboratory of Electroanaly tical Chem istry, Changchun Institute of A lied Chem istry, ChineseAcademy of Sciences, Changchun 130022) Abs tract: Presently, silica aerogels are the lightest solidmaterialwhich have thebestproperty in thermal insulation and have the higher porosity, the lower sound velocities in theworld. The silica aerogels have many unique properties ow ing to their special structure. This paper began from the history and the study nowadays of silica aerogels, then their properties, their application in different aspects and their prepared principlewere summ arized and their prospectof developm enthad been proposed. K ey w ord s: silica aerogels; sol- gelmethod; supercriticaldrying technology , , , , , BASFBESY,