应用透射电子显微镜分析膨润土的微观形貌及结构模式  

Analytics of Bentonite Micromorphology andthe Model of It's Construction by TEM

作　　者：Li Desan (Shenyang Research Institute of Foundry) 

机构地区：[1]机械电子部沈阳铸造研究所电镜试验室

出　　处：《铸造》1989年第10期26-31,23,共7页Foundry

摘　　要：采用透射电镜研究了钠基、钙基等各类膨润土的微观形貌特征.指出钠土的微晶尺寸为钙土的十六分之一是钠土吸水性强,吸水后膨胀量大以及在水中分散性好的根本原因.研究认为,膨润土的组成模式是多种氧化物的混合物,彼此机械混合或以共格,半共格方式连接.The micromorphology characteristic of sodium bentonite and calcium bentonite is studied by means of TEM. The experimental results show that microlitic size of the sodium bentonite is oae sixteenth of the calcium bentonite, that explains why the absorptivity of sodium bentonite is stronger than that of the calcium bentonite dispersivity of sodium bentonite in water is preferred to calcium bentonite and the absorbed expansion quantity of sodium bentonite is larger than that of calcium bentonite. The results show that the bentonites are mixt-crystal of many oxides which combine each other in manner of mechanical mixt both coherence or half-co herence

关 键 词：电镜分析 膨润土 

分 类 号：P578.967[天文地球—矿物学]