摘要
对Sn(Sb)O2干凝胶的结构进行了试验及模拟研究,通过BET-N2吸附及XRD分析,详细研究了SnO2凝胶在200～600℃干燥过程中凝胶骨架纳米结构及其变化规律,并研究了掺杂元素Sb对纳米结构演变的影响.研究发现:SnO2干凝胶为1～10nm的纳米多孔结构,其结构特征符合圆柱体通孔模型;随着固化温度的升高,凝胶骨架粗化,但结构特征相似性不变,孔体积率也基本不变;Sb的增加有细化骨架的作用.
The microstructure of the Sn(Sb)O2 xerogel was studied. The BET-N2 adsorption and XRay diffraction were used to characterize the structure of gel solidified between 200 ℃ and 600 ℃. Influence of doping Sb on the structure of gel was covered. BET and XRD data indicate that the xerogels are of porous structure of size 1～10 nm.. The microstructure of the xerogel can be described by Sherer's Cylinder Skeleton Model. With increasing temperature, the skeleton coarsens and enlarges while its radius/length ratio keeps the same. On the other hand, doping Sb addition makes the gel skeleton finer.
出处
《材料科学与工艺》
EI
CAS
CSCD
2003年第1期85-88,共4页
Materials Science and Technology
基金
国家"九五"科技攻关资助项目(96-119-04-05-01).
