Al2O3溶胶的制备工艺优化及性质的探讨

本文通过对Ａｌ２Ｏ３溶胶制备的原料进行了选取，对Ａｌ２Ｏ３溶胶的制备过程的主要影响因素－加水量、胶溶剂和温度进行了分析，优化了Ａｌ２Ｏ３溶胶的制备工艺，并提出了一种较为快捷出了一种较为快捷的制备工艺，制得了稳定透明的Ａｌ２Ｏ３溶胶；Ａｌ２Ｏ３溶胶的存在比较稳定，在浓度为异丙醇铝：水小于１：１００时可丰放时间大于３个月。对Ａｌ２Ｏ３溶胶的性质进行了探讨，发现Ａｌ２Ｏ３溶胶可以稳定存放的ｐＨ值为３．５

STUDY ON OPTIMIZING OF THE PREPARATION TECHNOLOGY OF Al2O3 SOL AND ITS CHARACTERISTICS

The raw materials for preparing Al2O3 sol are selected and the main factors(water content,catalyst and temperature) which affect the preparation technology have been analyzed. The preparation technology of Al2O3 sol is optimized and a faster preparation method of Al2O3 sol is proposed. Stable and transparent Al2O3 sols are prepared. Al2O3 sol can be stably stored comparably.As the mole ratio of Al(C3H7O)3 to water is less than 1100,the sol can be stored more than 3 months without gelating. The characteristics of Al2O3 sol and the gelating mechanisms of the sol have been studied. It showed that the Al2O3 sol can be stored stably when the pH value is between 3.5 and 4.5. The Al2O3 sol will gelate when the acidity or alkalinity of the sol is very strong. It is the repulsion that keeps the A2O3 sol being stored stably. There is no absolute bound between the Al2O3 sol and its gel, the Al2O3 sol and its gel can be transformed each other.