Modifications in the microstructure of alumina porous materials by hydrothermal treatment

摘要

Thin films of microporous γ-alumina were pre- pared by hydrothermal treatment of boehmite which was obtained by a sol-gel process. Films of boehmite hydrothermally treated at different temperatures and times were studied by X-ray diffraction, Nitrogen Adsorp- tion, DTA/TG Thermal Analysis and Scanning Electron Microscopy. The results showed that a well-crystallized Boehmite with an anisotropic particle growth mainly in The (002) plane was obtained. The modifications intro- Duced into the boehmite affected the microstructure, such As surface area, pore morphology, pore volume, pore size Distribution and thermal stability of the corresponding Alumina.