以茂名高岭土为原料制备亚微米级α-Al_2O_3粉体  

Preparation of submicronα-Al_2O_3 powder from Mao-Ming kaolin

作　　者：李宁宁[1] 王韵金[1] 张永明[1] 王立成[1] 刘小鹏[1] 

机构地区：[1]海南大学海南省石油化工产品检测技术重点实验室,海口570228

出　　处：《化工新型材料》2015年第4期70-72,共3页New Chemical Materials

基　　金：海大化工学科基金(HG-201301)

摘　　要：研制粒度分布集中、颗粒圆度好的亚微米α-Al2O3粉体材料是超细氧化铝材料研究领域的一个重要课题。分析了以茂名水洗高岭土的化学组成，并以此高岭土为原料，以酸法制备氧化铝的q-间产物硫酸铝铵为铝源，采用尿素沉淀法，进行超细α-Al2O3粉体的制备研究。结果表明，茂名水洗土Al2O3含量高达40％，可用该原料制备出硫酸铝铵；该硫酸铝铵经尿素水解法沉淀，得到前驱体Al（0H）3，前驱体经分散干燥和高温焙烧，得到粒径分布范围在50～170nm之间、粒子形状为球形的亚微米级粉体材料。The preparation of submicron α-Al2O3 powder material with concentrated particle size distribution and good particle roundness is an important subject in the field of the ultrafine alumina materials research. The preparation of submicron α-Al2O3 powder from Mao-Ming kaolin was related. The kaolin was leached by sulfuric acid to produce aluminum ammonium sulfate. The ultrafine powder of α-Al2O3 was prepared by urea-precipitation method from above aluminum am monium sulfate. The results showed that Mao-Ming kaolin contained higher Al2O3 content greater than 40%. The submicron powder was obtained from the precursor AI（OH）3 which was prepared from aluminum ammonium sulfate by urea-pre eipitation method,and the powder was constituted of spherical particles having the size of 50~ 170nm .

关 键 词：茂名高岭土 均匀沉淀 亚微米 α-Al2O3粉体 

分 类 号：TQ133.1[化学工程—无机化工]