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J. Korean Ceram. Soc. > Volume 46(4); 2009 > Article
Journal of the Korean Ceramic Society 2009;46(4): 392.
doi: https://doi.org/10.4191/kcers.2009.46.4.392
소결조제를 달리해 상압 반응소결로 제조된 AlON의 투명도
구본경, 구교헌, 김지혜, 정인철, 이재형
영남대학교 신소재공학부
Transparency of AlON Fabricated by Pressureless Reaction Sintering Using Various Sintering Aids
Bon-Kyung Koo, Kyeo-Hun Koo, Ji-Hye Kim, In-Chul Jung, Jae-Hyung Lee
Department of Materials Science and Engineering, Yeungnam University
AlON was fabricated by the pressureless reaction sintering of $Al_2O_3$-AlN powder mixtures. The ratio of AlN to $Al_2O_3$ as well as various sintering aids were the main variables for this study. The optimum ratio of AlN in the $Al_2O_3$-AlN mixture was approximately 35.0 mol%. For the sintering aids, only when a small amount of MgO was added together with $Y_2O_3$ and BN, AlON specimens could be sintered to a full density with negligible pores and high transparency. Other combinations of $Y_2O_3$, BN, CaO and MgO resulted in enough pores in the sintered specimens to have in-line transmittance only between 0% and 30%. The in-line transmittance reached over 80% after sintering at $1975^{circ}C$ for 10 h for the specimen containing 0.15 wt% MgO, 0.08 wt% $Y_2O_3$ and 0.02 wt% BN.
Key words: AlON, Transmittance, Reaction sintering, Sintering aids, Porosity
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