Surface tension in liquid alloys of sodium-cesium system
Experimental data on surface tension in liquid alloys of sodium-cesium system are presented. The measurements were taken with the sessile drop method, using high purity alloy components. It is shown that in sodium based alloys cesium exhibits high surface activity up to 3000 mN/(m·at.%). The experimental results presented are supported by the data on activity coefficient of cesium in sodium alloys, by the authors previous studies of the electronic work function of the Na - Cs system, and are in satisfactory agreement with surface tension calculations based on electron-statistical theory and electron density functional methods.