The Kinetics of $Si_3N_4$ Formation from Korean Rice Hulls

국산 왕겨로부터 질화규소 형성에 관한 속도론적 연구

  • 강상원 (한국과학원 재료공학과) ;
  • 천성순 (한국과학원 재료공학과)
  • Published : 1979.02.01

Abstract

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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References

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