摘要
本文通过用异丙醇铝水解的溶胶—凝胶法制备了勃姆石溶胶。对其制备过程的主要影响因素—胶溶剂种类及其用量、水解温度及加水量、老化温度及老化时间等进行了研究，探索出了制备稳定、清澈的勃姆石溶胶（ 也称为铝溶胶） 的最佳条件，并对勃姆石溶胶的性质进行了探讨。证实勃姆石胶粒带正电荷，发现勃姆石溶胶稳定存在的ｐＨ 值为３ ．５ ～４ ．１ 。配性太强，溶胶粘度过大易胶凝；酸性太弱，得不到完全胶溶稳定的溶胶。
Boehmite sol (γ AlOOH sol) is prepared by sol-gel process with the aid of hydrolysis of alumina isopropyl alcoholate in this study.It also studies the main factors affecting its preparing process including the types and quantities of used peptizers,hydrolytic temperature,amount of added water,ageing temperature and ageing time and so on.The optimum conditions to prepare stable and clear boehmite sol are seeked,and its properties are also discussed in this paper.It has been demonstrated that the boehmite sol particles possess positive charges, and the stable existing range falls in the values of pH from 3.5～4.1. When the acidity is too strong,its collosol viscosity is too large and the sol becomes easily gelled.A complete peprized and stable sol cannot be gained when the acidity is too weak.There is not any apparent bounds between the transition of boehmite sols and gels.
出处
《陶瓷学报》
CAS
1999年第2期87-91,共5页
Journal of Ceramics
基金
江西省九五重点科技攻关资助项目
关键词
铝溶胶
溶胶凝胶法
三氧化二铝
薄膜
boehmite sol (γ-AlOOH sol) sol-gel process, ultra-filtrated Al 2O 3 film
