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J. Korean Ceram. Soc. > Volume 51(6); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(6): 539.
doi: https://doi.org/10.4191/kcers.2014.51.6.539
고분자 복제 템플릿 방법을 이용하여 제조된 다공성 탄화규소의 미세구조 특성
이윤주, 김수룡, 김영희, 신동근, 원지연, 권우택
한국세라믹기술원 에너지환경소재본부
Characterization of Microstructure on Porous Silicon Carbide Prepared by Polymer Replica Template Method
Yoon Joo Lee, Soo Ryong Kim, Young Hee Kim, Dong Geun Shin, Ji Yeon Won, Woo Teck Kwon
Energy & Environmental Division, Korea Institute of Ceramic and Technology
Foam type porous silicon carbide ceramics were fabricated by a polymer replica method using polyurethane foam, carbon black, phenol resin, and silicon powder as raw materials. The influence of the C/Si mole ratio of the ceramic slurry and heat treatment temperature on the porous silicon carbide microstructure was investigated. To characterize the microstructure of porous silicon carbide ceramics, BET, bulk density, X-ray Powder Diffraction (XRD), and Scanning Electron Microscope (SEM) analyses were employed. The results revealed that the surface area of the porous silicon carbide ceramics decreases with increased heat treatment temperature and carbon content at the $2^{nd}$ heat treatment stage. The addition of carbon to the ceramic slurry, which was composed of phenol resin and silicon powder, enhanced the direct carbonization reaction of silicon. This is ascribed to a consequent decrease of the wetting angles of carbon to silicon with increasing heat treatment temperature.
Key words: Porous, Silicon carbide, Microstructure, Thermal property, Foam
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