Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Characterization of Microstructure on Porous Silicon Carbide Prepared by Polymer Replica Template Method

고분자 복제 템플릿 방법을 이용하여 제조된 다공성 탄화규소의 미세구조 특성

  • Lee, Yoon Joo (Energy & Environmental Division, Korea Institute of Ceramic and Technology) ;
  • Kim, Soo Ryong (Energy & Environmental Division, Korea Institute of Ceramic and Technology) ;
  • Kim, Young Hee (Energy & Environmental Division, Korea Institute of Ceramic and Technology) ;
  • Shin, Dong Geun (Energy & Environmental Division, Korea Institute of Ceramic and Technology) ;
  • Won, Ji Yeon (Energy & Environmental Division, Korea Institute of Ceramic and Technology) ;
  • Kwon, Woo Teck (Energy & Environmental Division, Korea Institute of Ceramic and Technology)
  • 이윤주 (한국세라믹기술원 에너지환경소재본부) ;
  • 김수룡 (한국세라믹기술원 에너지환경소재본부) ;
  • 김영희 (한국세라믹기술원 에너지환경소재본부) ;
  • 신동근 (한국세라믹기술원 에너지환경소재본부) ;
  • 원지연 (한국세라믹기술원 에너지환경소재본부) ;
  • 권우택 (한국세라믹기술원 에너지환경소재본부)
  • Received : 2014.10.02
  • Accepted : 2014.11.12
  • Published : 2014.11.30
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Abstract

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.

Keywords

References

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