Effect of urea on synthesis of aluminum nitride powders from aluminum nitrate and glucose
来源期刊：中国有色金属学报(英文版)2003年第1期
论文作者：秦明礼 曲选辉 林健凉 肖平安 汤春峰 祝宝军 雷长明
文章页码：170 - 174
Key words：aluminum nitride; urea; precursor; carbothermal reduction
Abstract: AlN powders were synthesized by carbothermal reduction method from aluminum nitrate and glucose. The effect of urea on the preparation and nitridation of the precursors was studied. It is found that urea can affect the morphology and composition of the precursor as well as the nitridation process. During the nitridation process of the precursor prepared without urea, α-Al2O3 and AlON are detected and a high temperature(1600℃) is needed for a complete conversion. While for the precursor prepared with urea, a complete conversion is got at a relatively low temperature(1400℃) and AlN is synthesized directly from γ-Al2O3, with no sign of the formation of α-Al2O3 and AlON. AlN powders synthesized from the precursor prepared without urea agglomerate badly, while the powders synthesized from the precursor prepared with urea are soft aggregates of fine particle, which can be easily dispersed.
