Ordered structure and preferred orientation of boehmite films prepared by the sol–gel method
- 作者：Popa ; Aurelian Florin ; Rossignol ; Sylvie ; Kappenstein ; Charles
- 关键词：S310 ; A160 ; 68.55.Jk ; 81.07.Bc ; 81.20.Fw ; 82.70.Gg
- 刊名：Journal of Non-Crystalline Solids
- 出版年：2002
- 期刊代码：50_00223093
- 类别：ms
- 出版时间：August, 2002
- 卷：306
- 期：2
- 页码：169-174
- 文件大小：149 K
摘要
Several boehmite films were produced using the sol–gel route. The drying process, the film structure evolution and the final texture of the samples were investigated by means of combined X-ray diffraction and weight variation. A remarkable (010) preferred orientation (about 97%of the crystallites) was found for xerogel films with thickness ranging from 1.5 to 24 μm. The ordered structure is already present in the sol state and is appeared and enhanced during drying, before gelling. This phenomenon may be attributed to the particular boehmite structure that induces special crystallite organization in the aquagel.