| 알루미늄의 진공증발과 열산화에 의한 알루미나 복합분리막의 제조 및 특성분석 |
| 이동호, 최두진, 현상훈 |
| 연세대학교 세라믹공학과 |
| Synthesis and Characterization of Alumina Composite Membrane by Al Evaporation and Thermal Oxidation |
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| ABSTRACT |
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The ceramic composite membrane was synthesized by thermal oxidation after evaporation of Al on the support prepared by slip casting process. Oxidation was performed at $700^{circ}C$ and 80$0^{circ}C$ under dry oxygen atmosphere. It was considered as optimum oxidation condition that the membrane showed a knudsen behaviro. A further oxidation resulted in an increase of gas permeability because top layer became densified. Then, a multi-layered composite membrane was synthesized through a sol-gel method, evaporation and thermal oxidation of Al coating processes. While the membrane was thermally stable up to 80$0^{circ}C$, gas permeability was rapidly decreased even at a slight amount of deposition of Al. |
| Key words:
Evaporation, Thermal oxidation, Knudsen diffusion, Gas permeability |
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