不同沉淀剂制备纳米氧化铝粉的研究  

Study on preparation of nano-sized alumina powder with different precipitants

作　　者：王静[1] 童小翠[1] 许永[1] 潘裕柏[2] 

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001 [2]中国科学院上海硅酸盐研究所

出　　处：《无机盐工业》2011年第6期14-16,23,共4页Inorganic Chemicals Industry

基　　金：高性能陶瓷与超微结构国家重点实验室开放基金项目(SKL200809SIC);国家自然科学青年基金项目(51002002)

摘　　要：采用均匀沉淀法,以硫酸铝铵为原料,研究了不同沉淀剂(尿素和碳酸铵)制备的氧化铝粉。采用透射电镜、X射线衍射仪、热分析仪等,对采用不同沉淀剂制得的前驱体和氧化铝粉末的结构和形貌进行了表征。结果表明,以尿素为沉淀剂制得的前驱体氢氧化铝和氧化铝粉末在分散性以及颗粒大小和形状方面都优于以碳酸铵为沉淀剂的产品。此外,以尿素为沉淀剂制得的前驱体氢氧化铝在1 200℃煅烧2 h得到了结晶度较好的纯相α-氧化铝,而以碳酸铵为沉淀剂制得的前驱体碳酸铝铵在1 200℃煅烧2 h得到θ-氧化铝和α-氧化铝的混合相。Two kinds of alumina powder prepared by different precipitants （ urea and ammonium carbonate） with homo- geneous precipitation method and ammonium aluminum sulfate as raw material were researched. Structure and morphology of precursor and alumina powder produced by two different precipitants were characterized by means of TEM, XRD, and TG/ DTA etc. Results suggested that precursor AI（OH） 3 and alumina powder, using urea as precipitant,were superior to that using ammonium carbonate in dispersion, size, and shape of particle. Besides, the precursor Al （ OH ） 3, calcined in 1 200 ℃ for 2 h, turned into pure phase a - alumina with good degree of crystallization contrast with NH4Al（OH ） 2 CO3 turned into mixed phase of 0 - alumina and a - alumina under the same coditions.

关 键 词：α-氧化铝粉体 均匀沉定法 尿素 碳酸铵 

分 类 号：TQ133.1[化学工程—无机化工]