<Original Papers>Surface Tension of Copper at the Freezing Point and in the Liquid State

This study was carried out in order to determine several physical properties of copper at the freezing point and in the liquid state. Surface tension of copper at the freezing point was measured by the sessile drop method, and the surface tension of copper in the liquid state by the maximum bubble pressure method. From these results, it was recognized that the surface tension of copper at the freezing point was larger by about 660 to 1070 dyne/cm than the surface tension at melting point calculated by extrapolation from the relationship between surface tensions and temperatures measured by the maximum bubble pressure method