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Acta Metall Sin  1965, Vol. 8 Issue (2): 251-258    DOI:
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THE TEMPERATURE COEFFICIENT OF SURFACE TENSION OF PURE COPPER
YEN SHUO Institute of Metal Research; Academia Sinica
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YEN SHUO Institute of Metal Research; Academia Sinica. THE TEMPERATURE COEFFICIENT OF SURFACE TENSION OF PURE COPPER. Acta Metall Sin, 1965, 8(2): 251-258.

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Abstract  The change of surface tension of molten copper with temperature was measured bymeans of the sessile drop method both on heating and on cooling. It is shown that thetemperature coefficient of surface tension is negative, being -0.470 dyne/cm·℃ at1100-1500℃. A maximum was observed on the surface tension-temperature curve at1350℃, indicating an apparent positive coefficient up to this temperature. This is ex-plained by the presence of residual surface active impurities in the original sample whichlowered the surface tension, and the removal of such impurities during heating.
Received:  18 February 1965     
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