【摘要】 <正> 膨润土是以蒙脱石为主要成分的一种粘土(彭琪瑞,1963)。蒙脱石是一种层状结构的铝硅酸盐矿物,颗粒极细,大部分的粒径在1微米以下,晶层之间有吸附态阳离子,并可容纳多层分子,故容易水化膨胀,其水悬液中的颗粒在适宜条件下能结成网状结构,变成粘稠的泥浆。基于这些性质,膨润土在农业、钻探、染织等方面都有广泛的用途。我国膨更多还原

【Abstract】 The physico-chemical properties of four samples of bentonite collected from Jiutai in Jilin Province, Changwei in Shandong Province and Nanjing in Jiangsu Province were studied. X-ray diffraction and chemical analysis of these samples were made and their particle size distribution, viscosity and cation exchange capacity were determined. Results obtained showed that all these bentonites were Ca-Mg clays. The sample colltcted from Nanjing had a higher exchange capacity and that from Jiutai contained more exchangeable sodium.更多还原