两步水解制取氧化铝纳米微粉的研究  

Preparatlon of Ultrafine Al2O3 Particles by Two-step Hydrolysis of Al(OC3H7)3 Using Sol-Gel Technigue

作　　者：宁桂玲[1] 林源[1] 丛昱[1] 吕秉玲[1] 

机构地区：[1]大连理工大学

出　　处：《仪器仪表学报》1995年第S1期314-318,共5页Chinese Journal of Scientific Instrument

摘　　要：以高纯异丙醇铝为先驱物，在有机分散剂中两步水解制备Ａｌ２Ｏ３超细粉体，探讨了各种因素的影响。对粉体进行了透射电镜（ＴＥＭ）、热重（ＴＧ）、差热（ＤＴＡ）、Ｘ射线衍射及表现分散性能等表征，结果表明：溶剂种类，水解温度及酸度对氧化铝水合溶胶及成品粉体特征有较大影响，当先驱物：水：分散剂的摩尔比为１∶３～３．１∶４０～５０，温度分别为室温和５０～６０℃时，得到粒径小于１０ｎｍ、均匀、稳定的氧化铝超细粉，产品为非晶态，在有机溶剂中有良好的分散性与透明性。Abstract Ultrafine Al2O3 particles have been prepared by two-step hydrolysis of Al(OC3H7)using sol-gel technigue,Some factors which influence the particles diameters andproperties of Al2O3 ultrafine particles were studied.The products were identified by TG.DTA. and TEM,..The results show that the kinds of dispersant.temperature of hydrolysisconcentration and acidity of reactants have significant effects on the size of Al2O3 collidal par-ticles.Under the conditions of T=25-30℃(1st.step),50-60℃(2nd. step),precursor:H2O:dispersant=1∶3.0～3.1∶40～50 in mole.The particle sizes of Al2O3 less than 10nmcan be obtained,and the powders obtained have a good dispersity and transparency in non-polar organic dispersants.

关 键 词：超细氧化铝 异丙醇铝 纳米微粉 氧化铝水合物 有机分散剂 透射电镜 先驱物 超细粉体 摩尔比率 有机溶剂 

分 类 号：TB44[一般工业技术]