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J. Korean Ceram. Soc. > Volume 32(3); 1995 > Article
Journal of the Korean Ceramic Society 1995;32(3): 349.
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
ABSTRACT
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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