논문 상세보기

폴리카보실란 에멀젼의 동결건조를 이용한 다공체 SiC 제조 KCI 등재 SCOPUS

Preparation of Porous SiC by Freeze Drying of Polycarbosilane Emulsion

  • 언어KOR
  • URLhttps://db.koreascholar.com/Article/Detail/315619
구독 기관 인증 시 무료 이용이 가능합니다. 4,000원
한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

Porous SiC beads were prepared by freeze-drying a polycarbosilane (PCS) emulsion. The water-in-oil (w/o) emulsion, which was composed of water, PCS dissolved p-xylene, and sodium xylenesulfonate (SXS) as an emulsifier, was frozen by dropping it onto a liquid N2 bath; this process resulted in 1~2 mm sized beads. Beads were cured at 200 oC for 1 h in air and heat-treated at 800 oC and 1400 oC for 1 h in an Ar gas flow. Two types of pores, lamella-shaped and spherical pores, were observed. Lamellar-shaped pores were found to develop during the freezing of the xylene solvent. Water droplets in the w/o emulsion were changed into spherical pores under freeze-drying. At 1400 oC of heat-treatment, porous SiC was synthesized with a low level of impurities.

목차
1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 Acknowledgement
 References
저자
  • 황 연(서울과학기술대학교 신소재공학과) | Yeon Hwang