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J. Korean Ceram. Soc. > Volume 31(1); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(1): 79.
AlN 분말의 가수분해 특성
최상욱, 정홍식1, 황진명
인하대학교 공과대학 무기재료공학과
1동양화학공업(주) 중앙연구소
Hydrolysis of Aluminum Nitride Powder
ABSTRACT
Aluminum nitride was hydrolyzed in contact with water, evolving the reaction heat of 172 cal/g within 12 hours to form alumina trihydrates. At 4$0^{circ}C$ >, amorphous alumina hydrate was easily produced by the spontaneous breaks of AlN particle at the beginning of the hydrolysis process, while bayerite was formed by the dissolution-recrystallization processes of amorphous alumina hydrate at the temperature between 4$0^{circ}C$ and 6$0^{circ}C$, and pseudo-boehmite was generated on the surface of AlN particle by the condensation process of the corresponding phase at 6$0^{circ}C$ <. The longer the hydrolysis timje or the higher the value of pH in solution, the more the bayerite phase was produced. However, pseudo-boehmite was easily generated under the following favorable conditions; when the hydrolysis reaction occured rapidly at the beginning and when the absorption of OH radical on the surface of AlN particle was disturbed by ethyl alcohol in a solution. However, aluminum nitride was hardly hydrolyzed in a solution of pH 2.0
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