%0 Journal Article
%T STUDY ON FRACTAL STRUCTURE OF POROUS SILICA:AEROGELS AND XEROGELS<br>二氧化硅多孔介质气凝胶和干凝胶的分形结构研究
%A SHEN JUN
%A WANG JUE
%A WU XIANG
%A <br>沈军
%A 王珏
%A 吴翔
%J 物理学报
%D 1996
%I 
%X Porous materials silica aerogels and xerogels were obtained through a sol-gel process from TEOS. Samples derived from different preparation circumstances were investigated via small-angle X-ray scattering. The power-law dependence of the scattered intensity, a characteristic of fractal structures, was observed for all the one-step aerogels. While for the xerogels and aerogels derived from a two-step sol-gel process, the power-law dependence of the scattered intensity was not observed. The xerogels are found to consist of a number of large spherical particles which were densely packed together.
%K 二氧化硅
%K 分形
%K 多孔
%K 气凝胶
%K 干凝胶
%K 分子结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=7411BF4698E83734095E2CBF9E95F311&yid=8A15F8B0AA0E5323&vid=94E7F66E6C42FA23&iid=9CF7A0430CBB2DFD&sid=76DA548BC2ECBC62&eid=CAF3E71A6764366D&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=6