喷雾热解法制备Al_2O_3粉末  

Preparation of Al_2O_3 Powders by Spray Pyrolysis Deposition

作　　者：赵爱春[1] 张廷安[1] 吕国志[1] 豆志河[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第3期401-404,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50974035;51074047;51004033);国家"十一五"科技支撑计划项目(2008BAB34B01);中央高校基本科研业务费专项资金资助项目(N100302005)

摘　　要：以AlCl3.6H2O为原料,采用喷雾热解法制备了纯度较高的Al2O3粉末,并利用XRD,SEM技术和比表面积分析仪研究了Al2O3粉末的物相组成、微观形貌及比表面积.热力学计算和DSC-TGA分析分别表明：在800~2 200 K温度范围内,热解主反应可以发生,提高温度更有利于反应发生;氯化铝热解适宜的温度为800℃.实验结果表明：喷雾热解最优条件是热解温度为750~850℃,AlCl3溶液质量分数为15%,热解时间为20 min.热解产物Al2O3粉末满足电解铝要求.High purity Al2O3 powders were deposited successfully by the spray pyrolysis method using AlCl3· 6H2O as raw material. The phase composition and the micro-morphology of pyrolysis products were studied by X-ray diffraction （XRD） and SEM. Specific surface area was also analyzed by specific surface area analyzer. The thermodynamics results showed that the main pyrolysis reaction happens in the range of 800-2 200 K and increasing the reaction temperature is advantageous to the reaction. The pyrolysis temperature is 800℃ for AlCl3 by DSC-TGA analysis. The experimental results indicated that the optimum conditions are as follows： the mass fraction of AlCl3 solution is 15 %; the pyrolysis time is 20 min in the range of 750- 850 ℃2. Meanwhile, the pyrolysis produets meet the demands of electronic aluminum.

关 键 词：氧化铝 喷雾热解 氯化铝溶液 热力学分析 物相分析 

分 类 号：TF111[冶金工程—冶金物理化学]