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J. Korean Ceram. Soc. > Volume 50(4); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(4): 301.
doi: https://doi.org/10.4191/kcers.2013.50.4.301
폴리카보실란으로부터 제조된 탄화규소 중공사의 미세구조제어
신동근, 공은배, 조광연, 권우택, 김영희, 김수룡, 홍준성1, 류도형1
1서울과학기술대학교 신소재공학과
Nano-Structure Control of SiC Hollow Fiber Prepared from Polycarbosilane
Dong-Geun Shin, Eun-Bae Kong, Kwang-Youn Cho, Woo-Tek Kwon, Younghee Kim, Soo-Ryong Kim, Jun-Sung Hong1, Doh-Hyung Riu1
Korea Institute of Ceramic Engineering and Technology
1Department of Materials Science and Engineering, Seoul National University of Technology
SiC hollow fiber was fabricated by curing, dissolution and sintering of Al-PCS fiber, which was melt spun the polyaluminocarbosilane. Al-PCS fiber was thermally oxidized and dissolved in toluene to remove the unoxidized area, the core of the cured fiber. The wall thickness ($t_{wall}$) of Al-PCS fiber was monotonically increased with an increasing oxidation curing time. The Al-PCS hollow fiber was heat-treated at the temperature between 1200 and $2000^{circ}C$ to make a SiC hollow fibers having porous structure on the fiber wall. The pore size of the fiber wall was increased with the sintering temperature due to the decomposition of the amorphous $SiC_xO_y$ matrix and the growth of ${beta}$-SiC in the matrix. At $1400^{circ}C$, a nano porous wall with a high specific surface area was obtained. However, nano pores grew with the grain growth after the thermal decomposition of the amorphous matrix. This type of SiC hollow fibers are expected to be used as a substrate for a gas separation membrane.
Key words: Membrane, Hollow fiber, Silicon carbide, Polyaluminocarbosilane
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