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J. Korean Ceram. Soc. > Volume 30(3); 1993 > Article
Journal of the Korean Ceramic Society 1993;30(3): 189.
기체분리용 세라믹 복합분리막의 개발 : V. 가압 졸-겔 코팅법에 의한 rrmaltp입자 실리카 막의 합성
현상훈, 윤성필, 김준학1
연세대학교 세라믹공학과
1요업기술원
Development of Ceramic Composite Membranes for Gas Separation: V. Synthesis of Nanoparticulate Silica Membranes by the Pressurized Sol-Gel Coating Technique
ABSTRACT
A new pressurized sol-gel coating technique forming membrane layers inside pores of the porous support by the simple operation has been developed. Crack-free and reproducible nanoparticulate silica membranes supported on the porous $alpha$-alumina tube are synthesized by pressurized coating at 600kPa for 2hr. The pore radius and N2 gas permiability at the room temperature of silica membrane layers are 8$AA$ and 7.0$times$10-7mol/$m^2$.s.Pa, respectively. The mechanism of N2 gas transfer through synthesized membrane layers is the perfect Knudeen flow, and the thermal stability of the silica composite membranes is excellent upto 40$0^{circ}C$.
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