Preparation of AlN Powder by Combustion Reaction in the System of Al-AlN-NH<sub>4</sub>Cl

Min, Hyun-Hong; Won, Chang-Whan; Min, Hyun-Hong; Won, Chang-Whan

doi:2006.43.7.445

J. Korean Ceram. Soc. > Volume 43(7); 2006 > Article

Journal of the Korean Ceramic Society 2006;43(7): 445.
doi: https://doi.org/10.4191/kcers.2006.43.7.445

Al-AlN-NH₄Cl 계에서 연소반응에 의한 AlN 분말의 제조

민현홍, 원창환

충남대학교 급속응고신소재연구소

Preparation of AlN Powder by Combustion Reaction in the System of Al-AlN-NH₄Cl

Hyun-Hong Min, Chang-Whan Won

Engineering Research Center for Rapidly Solidified Materials, Chungnam National University

ABSTRACT

The preparation of AlN powder by SHS in the system of $Al-AlN-NH_4Cl$ was investigated in this study. In the preparation of AlN powder, the effect of gas pressure and the composition such as Al, AlF, and additive in mixture on the reactivity were investigated. At 60 atm of the initial inert gas pressure in reactor, the optimum composition for the preparation of pure AlN was 35 wt%Al+5 wt% $NH_4Cl+60wt%$AlN. The AlN powder synthesized in this condition was a single phase AlN with a whisker morphology.

Key words: SHS, AlN, Composition, $NH_4Cl$, $NaN_3$