- 카올린의 환원 열탄화법에 의한 베타 탄화규소 휘스커의 합성
- ㆍ 저자명
- 오세정,류종화,조원승,최상욱
- ㆍ 간행물명
- 요업학회지
- ㆍ 권/호정보
- 1998년|35권 12호|pp.1249-1256 (8 pages)
- ㆍ 발행정보
- 한국세라믹학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
${eta}$-Silicon carbide(${eta}$-SiC) whiskers could be synthesized by the carbothermal reduction of kaolin at tem-peratures between 1400 and 1500$^{circ}C$. The whiskers were grown up to about 1150 of aspect ratio by VS mechanism (showing tapering tips) and to about 45 of that by VLS mechanism (showing round droplet tips) respectively. Hydrocarbon like methane in the reaction atmosphere promoted the formation of gaseous il-icon monoxide(SiO) from silicon dioxide(SiO2) and subsequently reacted with it to form whiskers. The for-mation of ${eta}$-SiC whiskers increased with increasing carbon content(to 30 wt%) and reaction temperatures. The max. yield of ${eta}$-SiC whiskers was 15% at 1500$^{circ}C$ under 20%CH4/80%H2.