TEMPERATURE DEPENDENCE OF SURFACE TENSION OF LIQUID PURE METALS.

Abstract

In order to discuss the temperature dependence of surface tension of liquid pure metals, the surface tension of Cu, Ag, Au, Sn and Pb in the liquid state was carefully measured by the sessile drop method in an atmosphere of a prepurified hydrogen or argon, with a partial oxygen pressure of about 10** minus **2**0 atm, over the temperature range between the melting points and 1450 degree C. The surface tension of these metals decreased linearly with increasing temperature over the entire temperature range irrespective of the kind of atmospheric gas. Further an attempt was made to account for the temperature dependence of surface tension of liquid pure metals from the phenomenological standpoint and a simple equation for the temperature change of surface tension of liquid pure metals was derived.