| 학회 | 한국재료학회 |
| 학술대회 | 2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 | 19권 2호 |
| 발표분야 | C. 에너지/환경 재료(Energy and Environmental Materials) |
| 제목 | Effective Reduction of SiO2 by various reducing agents for MG-Si |
| 초록 | The strong demand for cheaper solar cells has led to increased attention on the use of upgraded metallurgical-grade Si (MG-Si). However, few studies have investigated the thermodynamics of the reduction reaction and its effects on the morphology of MG-Si. Here, we investigated SiO2 reduction by solid carbon and various gas species (CO, H2, and CH4) to identify the optimal conditions for MG-Si on the basis of Gibbs free-energy minimization (FEM). It was found that the reduction rate with carbon increased both with temperature and the C/SiO2 ratio in the SiO2–C system. Further, CH4, which decomposes into active carbon at 1773K, was found to be the strongest reducing gas. The experimental results were in good agreement with the numerical predictions made using FEM. |
| 저자 | 정은진, 민동준 |
| 소속 | 연세대 |
| 키워드 | Reduction; SiO2; MG-Si; FEM; Reducing agents |
