Influence of Ethyl Acetoacetate on the Structure and Thermal Stability of Alumina Aerogel
| Autor: | Jian Feng, Yong Gang Jiang, Lin Xu, Jun Zong Feng |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Boehmite
Reaction mechanism Materials science Mechanical Engineering Supercritical drying Aerogel Condensed Matter Physics Microstructure Amorphous solid chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Ethyl acetoacetate Organic chemistry General Materials Science Thermal stability |
| Zdroj: | Materials Science Forum. 816:157-162 |
| ISSN: | 1662-9752 |
| Popis: | Alumina aerogels were prepared from aluminum sect-butoxide via sol-gel process and supercritical drying. The influence of Ethyl acetoacetate (Etac) on the aerogel properties, microstructure, and thermal stability was systematically studied. At the same time, reaction mechanism was also investigated. The results show that, without and with Etac addition, the alumina aerogels are consisted of crystalline boehmite and amorphous network, respectively. When nEtac/nAl molar ratio is 0.01~0.15:1, Al2O3 aerogels have larger surface area (71~98 m2/g) than pure alumina aerogel (61m2/g) after heated at 1200°C, a proper ratio of Etac is helpful to increases the gelation time and stability of alumina sol, and is useful to improve the thermal stability of Al2O3 aerogels. |
| Databáze: | OpenAIRE |
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