氢氧化铝凝胶的差热分析

Differential thermal analysis of aluminum hydroxide gel.

作者信息

Nail S L, White J L, Hem S L

出版信息

J Pharm Sci. 1976 Sep;65(9):1391-3. doi: 10.1002/jps.2600650932.

Abstract

The development of order during the aging of aluminum hydroxide gel prepared by the reaction of aluminum chloride and ammonium hydroxide to a final pH of 7.0 can be monitored by differential thermal analysis. The loss of acid reactivity upon aging is accompanied by an increase in the temperature and intensity of the dehydroxylation endotherm and an accompanying decrease in the intensity of the water of hydration endotherm. With continued aging, the thermogram develops the characteristics of a crystalline aluminum hydroxide.

摘要

通过差热分析可以监测由氯化铝与氢氧化铵反应制备的氢氧化铝凝胶在老化至最终pH值为7.0过程中有序结构的发展。老化过程中酸反应活性的丧失伴随着脱羟基吸热峰温度和强度的增加以及水合水吸热峰强度的相应降低。随着持续老化，热重曲线呈现出结晶氢氧化铝的特征。