Synthesis of AlON from Partially Hydrolyzed AlN Powder and its Sintering

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J. Korean Ceram. Soc. > Volume 31(11); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(11): 1362.

부분 가수분해된 AlN 분말로부터 산질화 알루미늄(AlON)의 합성 및 소결

김두영, 최상욱, 남건태

인하대학교 무기재료공학과

Synthesis of AlON from Partially Hydrolyzed AlN Powder and its Sintering

ABSTRACT

The hydrolysis of aluminum nitride was increased gradually with increasing reaction time from 1 hrs to 24 hrs and/or with decreasing the addition of the reaction water from 100 mι 100mι. Amorphous aluminum hydrate, formed in the beginning of the reaction, was transformed to bayerite and to pseudoboehmite at below and above 8$0^{circ}C$, respectively. Aluminum oxynitride was synthesized by heating the partially hydrolyzed aluminum nitride at 1$700^{circ}C$ for 4 hrs or at 175$0^{circ}C$ for 30 min. AlON specimen with 1 wt% of Y2O3 that was molded and then sintered pressurelessly at 190$0^{circ}C$, exhibits 98% of the theoretical density and a translucency of 68% in the visible ray zone.