均匀沉淀法制备超细α-Al_2O_3陶瓷粉体的形貌控制研究  

Morphology Control of Ultrafine α-Al_2O_3 Powder Prepared by Homogenous Precipitation

作　　者：肖劲[1] 周峰[1] 秦琪[1] 陈燕彬[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2008年第5期54-58,共5页Mining and Metallurgical Engineering

基　　金：湖南省自然科学基金资助项目(5JJ30103)

摘　　要：以Al2(SO4)3.18H2O和CO(NH2)2为原料,通过均匀沉淀法制备前驱物Al(OH)3,并煅烧得到超细α-Al2O3陶瓷粉体。采用激光粒度分析仪、SEM、XRD、DSC等对产物进行了检测。研究表明,溶液中阴离子种类、Al3+的初始摩尔浓度、反应温度、反应时间等对所合成产物的颗粒形貌影响显著。通过优化反应条件,实现了对产物形貌的有效控制,获得了分散性好、粒径为2μm左右且粒度分布均匀的球形超细α-Al2O3陶瓷粉体。Using Al2 （SO44） 3 · 18H2O and CO（ NH2） 2 as raw material, ultrafine α-Al2O3 power was obtained by calci- ning the precursor Al （OH） 3 prepared by homogeneous precipitation method. The products were detected by laser particle size analyzer, SEM, XRD and DEC etc. The results indicated that the categories of anions, initial molar concentration of Al^3＋ , reaction temperature and reaction time had significant effect on the particle morphology of the product. Effective control of the product morphology was realized and the spherical uhrafine α-Al2O3 powder with well-dispersed, particle size about 2 μm and homogenous particle size distribution was obtained by optimizing the reaction conditions.

关 键 词：超细α—Al2O3 粉体 均匀沉淀法 形貌 

分 类 号：TF123[冶金工程—粉末冶金]