Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 15    No. 5    October 2005

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Surface tension of molten tin investigated with sessile drop method
LI Jing(李 晶), YUAN Zhang-fu(袁章福), 
FAN Jian-feng(范建峰), KE Jia-jun(柯家骏)

Multi-phase Reaction Laboratory, Institute of Process Engineering, 
Chinese Academy of Sciences, Beijing 100080, China

Abstract: The surface tension of molten tin was determined by a set of self-developed digital equipment with sessile drop method at oxygen partial pressure of 1.0×10-6MPa under different temperatures, and the dependence of surface tension of molten tin on temperature was also discussed. The emphasis was placed on the comparison of surface tension of the same molten tin sample measured by using different equipments with sessile drop method. Results of the comparison indicate that the measurement results with sessile drop method under the approximate experimental conditions are coincident, and the self-developed digital equipment for surface tension measurement has higher stability and accuracy. The relationships of surface tension of molten tin and its temperature coefficient with temperature and oxygen partial pressure were also elucidated from the thermodynamic equilibrium analysis.


Key words:  molten tin; surface tension; sessile drop method; oxygen partial pressure; temperature coefficient

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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