厦门大学学报（自然科学版）2009，Vol.48Issue(4)：610-612,3.
高稳定性氧化铝-二氧化硅溶胶的制备及在莫来石纤维上的应用
Preparation of Stable Alumina-silica Sol and Its Application in Mullite Fiber
摘要
Abstract
A stable alumina-silica sol had been prepared by using aluminum sec-butoxide as the source of aluminum and partially hydrolyzed tetraethyl orthosilicate as the source of silicon.FTIR,XRD,SEM,TG and DTA were used to characterize the sol and examine the crystallographic and microstructure evolution of the dry-spun gel fibers during pyrolysis.It is found that ethyl acetoacetate (EAcAc) can effectively retard the precipitation in the sol by chelating with aluminum ions and significantly improve the stability of the sol.Polyvinylpyrrolidone (PVP) is compatible with the sol and has very positive effect on the dry-spinning ability of the spinning sol.No crystalline phases corresponding to alumina or silica have been found during pyrolysis before the formation of crystalline mullite phase at 980℃,indicating that the alumina-silica sol is mono-phasic.When the fiber was fired over 1 000℃,dense mullite fibers were obtained.关键词
仲丁醇铝/正硅酸乙酯/溶胶-凝胶/聚乙烯吡咯烷酮/莫来石纤维Key words
aluminium sec-butoxide/tetraethyl orthosilicate/sol-gel/polyvinylpyrrolidone/mullite fiber分类
通用工业技术引用本文复制引用
陈根,张力,陈立富..高稳定性氧化铝-二氧化硅溶胶的制备及在莫来石纤维上的应用[J].厦门大学学报（自然科学版）,2009,48(4):610-612,3.基金项目
福建省科技平台建设项目(2006L2003,2007H2004)和武器装备预研基金(9140A12050406QT87)项目资助 （2006L2003,2007H2004）
