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J. Korean Ceram. Soc. > Volume 20(2); 1983 > Article
Journal of the Korean Ceramic Society 1983;20(2): 129.
MgO.$nAl_2O_3$ 스피넬에 대한 증발속도의 측정으로부터 산소의 확산계수의 결정
이홍림, 배철훈
연세대학교 공과대학 요업공학과
Determination of Oxygen Diffusion Coefficient from Vaporization Rate of MgO.$nAl_2O_3$ Spinel
ABSTRACT
MgO.$Al_2O_3$ polycrstalline spinel powder was subjected to vaporization over the temperature range of 1150-130$0^{circ}C$ under H2 atmosphere. Diffusion coefficient of oxygen ion through the spinel were calculated using the measure vaporization rates as follows : D=28.4 exp(-901500/RT) Reference data of the vaporization rates of MgO.$8Al_2O_3$ single crystal spinel were applied to the vaporiza-tion model proposed in this study and were calculated to give the oxygen ion diffusion coefficients over the tempera-ture 1700-195$0^{circ}C$. The obtained diffusion coefficients are as follows: $D=3.20{times}106$ exp(-155600/RT)
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