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Journal of the Korean Ceramic Society 1979;16(2): 99. |
| 국산 왕겨로부터 질화규소 형성에 관한 속도론적 연구 |
| 강상원, 천성순 |
| 한국과학원 재료공학과 |
| The Kinetics of $Si_3N_4$ Formation from Korean Rice Hulls |
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| ABSTRACT |
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Themogravimetric analysis was used to investigate the kinetics of the $Si_3N_4$ formation from Korean rice hulls in the temperature range from $1990^{circ}C$ to $1370^{circ}C$. The experimental results indicated that the reaction rate controlling step in the overall process is the diffusion of CO gas from the surface of carbon particle to main body of $N_2$ gas fluid through the stagnant gas film around the carbon particle. The kinetics followed a nearly linear rate law at the initil reaction stage. The activiation energy for the formation of $Si_3N_4$ from Korean rice hulls was 43.5Kcal/mole. |
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