The surface tension of liquid sodium and liquid potassium

1965 ◽  
Vol 18 (11) ◽  
pp. 1711 ◽  
Author(s):  
DO Jordan ◽  
JE Lane
Keyword(s):  
Surface Tension ◽  
Melting Point ◽  
Temperature Coefficient ◽  
Vertical Plate ◽  
Liquid Metals ◽  
Liquid Sodium ◽  
Chemical Impurities ◽  
A Value ◽  
Pure Metals ◽  
Sodium And Potassium

A vertical-plate balance has been used to measure the surface tension and temperature coefficient of surface tension of liquid sodium and potassium. A value of 200.2�0.6 dyn cm-1 was obtained for the surface tension of liquid sodium at the melting point (97.8�), with a temperature coefficient of -0.11 dyn cm-1 deg-1. For liquid potassium the surface tension was found to be 110.3�1.0 dyn cm-1 at the melting point (64�), with a temperature coefficient of -0.06 dyn cm-1 deg-1. These results are compared with other published values of these quantities. A discussion, based on the statistical mechanics of a quasi-crystalline model of the liquid state, suggests that the chemical impurities present in the liquid metals are unlikely to have significantly increased the surface tension values above those of the pure metals.

Temperature coefficient of surface tension for pure liquid metals

1998 ◽  
Vol 191 (1-2) ◽  
pp. 268-274 ◽  
Author(s):  
N Eustathopoulos ◽  
B Drevet ◽  
E Ricci
Keyword(s):  
Surface Tension ◽  
Temperature Coefficient ◽  
Liquid Metals ◽  
Pure Liquid

scholarly journals Viscosity of liquid sodium and potassium

1936 ◽  
Vol 157 (891) ◽  
pp. 264-277 ◽  
Keyword(s):  
Alkali Metals ◽  
Capillary Tube ◽  
Liquid Metals ◽  
Vertical Axis ◽  
Crystal Form ◽  
Liquid Sodium ◽  
Organic Liquids ◽  
Viscosity Data ◽  
Coefficient Of Viscosity ◽  
Sodium And Potassium

According to the theory of liquid viscosity put forward by Professor Andrade, the viscosity of a liquid is closely connected with the characteristic frequency of vibration, and the temperature coefficient of viscosity obeys an exponential formula involving an internal energy coefficient. It appears that, for comparison with theory, viscosity data for elementary substances like liquid metals are specially desirable. Hitherto, viscosity measurements have been largely confined to organic liquids, while for liquid metals, with certain notable exceptions, viscosity data have been scanty and discrepant. The work described below was undertaken with the view of supplying some of the data which are needed. Sodium and potassium were chosen for the measurement on account of the simplicity of both their atomic structures and of their crystal form. They also have the advantage that the viscosities of the other three alkali metals—lithium, rubidium, and caesium—are also accessible to measurement, the melting points lying within an easily-realized temperature range. Owing to the fact that these metals oxidize very quickly in the presence of even a slight trace of air, the sphere method, in which the liquid is enclosed in a sphere and its viscosity found by observing the damping of the oscillations about a vertical axis, is specially suitable for the purpose. This method, as lately developed by Professor Andrade and the author, has proved capable of an accuracy probably as great as that of the standard methods. It is simple in manipulation, renders temperature control easy, and does not involve the corrections involved in capillary tube methods.

The temperature coefficient of the surface tension of pure liquid metals

1986 ◽  
Vol 17 (1) ◽  
pp. 163-170 ◽  
Author(s):  
K. Nogi ◽  
K. Ogino ◽  
A. McLean ◽  
W. A. Miller
Keyword(s):  
Surface Tension ◽  
Temperature Coefficient ◽  
Liquid Metals ◽  
Pure Liquid
Sign in / Sign up

Export Citation Format

Share Document