| 학회 | 한국재료학회 |
| 학술대회 | 2010년 가을 (11/11 ~ 11/12, 무주리조트) |
| 권호 | 16권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Phenyl group을 포함하는 silica sol을 이용한 β-SiC 분말 합성 |
| 초록 | Silicon carbide (SiC) powder and its application have been interested for its excellent properties such as high hardness, high strength, high thermal conductivity. Silicon carbide powders can be produced in various methods, including CVD from organometallic silicon, direct carbonization of Si metals, pyrolysis of silane compounds and carbothermal reduction of silicon dioxide(SiO2) with carbon. Direct carbonization method is the most general method with simple and low cost. But it leaves significant amounts of unreacted silicon and other impurities. Carbothermal reduction method can produce high purity SiC powder even though the production cost is high. For growing single crystal, it requires high purity SiC powder. And the carbothermal method is suitable for producing high quality SiC powder. The carbothermal method is based on the reacting of silica or silica sol with carbon source as starting materials. In this study, beta-silicon carbide(β-SiC) powder was obtained by carbothermal method with silica sol prepared from PTES(phenyl triethylsilicate) and TEOS(tetraethylorthosilicate). To achieve a fine dispersion of Si and carbon, PTES has phenyl group attached Si atom, and is estimated that the phenyl group as carbon source can react with silicon under atomic level. And it can be helpful to obtain high purity β-SiC powder without unreacted SiO2. To obtain high purity β-SiC power, carbothermal reaction was proceeded at 1600℃, 1700℃, and 1800℃ in Ar. And the β-SiC powders were characterized by SEM, XRD, Particle size analyzer and FT-IR spectroscopy. |
| 저자 | 정은진, 김영희 |
| 소속 | 한국세라믹기술원 |
| 키워드 | SiC powder / carbothermal reaction / silica sol / |
