煅烧方式和添加剂对碳热还原法制备氮化铝粉末的影响  

Effects of calcining methods and addictives on AlN powder prepared by carbothermal reduction

作　　者：肖劲[1] 陈燕彬[1] 周峰[1] 彭忠东[1] 李劼[1] 刘业翔[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《粉末冶金技术》2008年第5期332-335,共4页Powder Metallurgy Technology

摘　　要：以工业氢氧化铝和乙炔黑为铝源和碳源,采用碳热还原法制备了氮化铝粉末,讨论了煅烧方式和添加剂对制备氮化铝粉末的碳热还原反应的影响。利用原料的差热-热重分析,制定了有利于氮化反应的升温制度:870℃之前缓慢升温,870℃至反应温度为快速升温过程。通过对所合成的产物进行XRD检测分析表明:与传统电阻炉煅烧相比,采用微波煅烧能有效降低氮化铝粉末的合成时间和合成温度;结合添加剂D的加入,可使得前驱物在合成温度为1 400℃、反应时间为1h的普通氮气气氛下完全转化为氮化铝,添加剂D具有良好的氮化铝催化合成效果,能有效地提高氮化率。Taking industry aluminum hydroxide and acetylene black as the aluminum source and the carbon source, aluminium nitride powder has been prepared by earbothermal reduction method. Effects of calcining methods and addictives on the reaction of carbothermal reduction to prepare A1N powder have been discussed. TG/DTA analysis of aluminum hydroxide was used to determine the heating system. It＇s found that slow heating below 800℃ and fast heating till reaction temperature are in favor of nitrification. The reaction products prepared have been examined using XRD analysis. The results show that, compared with the traditonal calcining method, the microwave calcining is helpful to lower the reaction temperature and save the time, using industry aluminum hydroxide and acetylene black and addictive D, alumina is completely converted to AIN at 1 400℃ for l h under ordinary nitrogen by microwave calcining method. Additive D can be used as a good catalyst for this reaction to effectively increase nitridation rate.

关 键 词：碳热还原法 微波煅烧 添加剂 氮化铝粉末 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ426.6[化学工程—硅酸盐工业]