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J. Korean Ceram. Soc. > Volume 26(1); 1989 > Article
Journal of the Korean Ceramic Society 1989;26(1): 31.
AlN-SiO2-Al2O3계로부터 AlN-Polytypes의 제조
박용갑, 장병국
쌍용중앙연구소
Synthesis of AlN-SiO2-Al2O3 System
ABSTRACT
In order to synthesize AlN-polytypes from AlN-SiO2-Al2O3 system, composition A (AlN/SiO2/Al2O3=1/0.3/0.05, mole ratio) and composition B(AlN-SiO2-Al2O3=1/0.2/0.05, mole ratio) were used. AlN-polytypes were produced by nitriding the mixture at 175$0^{circ}C$~190$0^{circ}C$ under N2 atmosphere. For lower reaction temperature, 15R phase was produced and in the case of higher reaction temperature, AlN phase was only produced. As each composition was heated at 185$0^{circ}C$ in N2 atmosphere, produced main phases were 15R phase for composition A and 21R phase for composition B respectively. The fracture surfaces of produced reactants showed porous skeleton structure.
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