Synthesis of Aluminum Nitride from Metal Aluminum Powders

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J. Korean Ceram. Soc. > Volume 22(6); 1985 > Article

Journal of the Korean Ceramic Society 1985;22(6): 80.

금속알루미늄으로부터 질화알루미늄의 합성

최상욱, 이승제

인하대학교 무기재료공학과

Synthesis of Aluminum Nitride from Metal Aluminum Powders

ABSTRACT

Aluminum nitride (AlN) was synthesized from aluminum (Al) powders as a starting material in the tempe-rature range of 450~1, 15$0^{circ}C$ in the presence of 90% $N_2$-10%$H_2$ gases. The thermogravimentric analysis showed that the nitridation of Al powders started at about 43$0^{circ}C$ and escalated greatly from 53$0^{circ}C$. The scanning electron microcopic observation revealed that AlN crystals were different in shape with varying temperature of nitridation. The crystals of AlN which were formed in the lower temperature than the melting point of Al were spherical while those of AlN in the higher temperature were fibrous. The yield of AlN was determined quantitatively by both XRD method and weight gain between before and after the nitridation of Al compacts. It was considered that the former was available for the specimen which was made in the high nitriding temperature. But the latter was unavilable for the same one probably because of the volatile loss of Al in the higher temperature.