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J. Korean Ceram. Soc. > Volume 39(11); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(11): 1083.
doi: https://doi.org/10.4191/kcers.2002.39.11.1083
MgO 및 TiO2가 첨가된 알루미나의 치밀화와 입성장 거동
이정아, 김정주
경북대학교 무기재료공학과
Densification and Grain Growth Behavior of MgO and TiO2-doped Alumina
Jung-A Lee, Jeong-Joo Kim
Department of Inorganic Materials Engineering, Kyungpook National University
ABSTRACT
Densification and grain growth behavior of MgO and -doped alumina ceramics were investigated. MgO was found to inhibit grain growth and to promote densification, but acted to promote grain growth more than densification. The density which showed the maximum shrinkage rate was investigated in the plot of shrinkage rate versus density. The data suggests that the maximum shrinkage rate separates the two kinetic regimes, below the density of maximum shrinkage, the regime associated with densification and above the maxima, the regime associated with the grain growth. The plot exhibits a maximum which shifts to higher temperatures with MgO doping and to lower with doping.
Key words: $Al_2O_3$, MgO, $TiO_2$, Densification, Grain growth, Shrinkage, Shrinkage rate
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