【摘要】 对各地膨润土的热性质进行了考察,讨论了膨润土差热曲线和热失重的形态特征,以及膨润土热性质与其他物理化学性质的关系。研究表明,供试膨润土均可观察到三组吸热效应,部分样品可观察到一组放热效应。其中第一组吸热谷因层间所含有阳离子的种类和数量不同而呈现单谷或复谷两种不同的形态;根据第三吸热谷与放热峰这两个效应的峰间隔差和形态变化对供试膨润土进行属型划分简单易行。更多还原

【Abstract】 The thermal properties of various bentonites from China were investigated. The characteristics of the differential thermal property and thermogravimetric property of the bentonites were discussed. The relationship between the thermal properties and other physicochemical properties of bentonites was analysed. The results from differential thermal analysis (DTA) showed that three endothermal valleys were observed for all samples and some also had an exothermal peak. The difference of DTA pattern in low temperature, such as single and double valley, was caused by the type and composition of cations between layers. The deposit type of bentonites could be easily classified on the base of feature of the third endothermal valley and the exothermal peak.更多还原