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...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.展开更多
根据结晶器保护渣组成与成分范围,在实验渣成分设计的基础上,采用静滴法,利用渣金界面性质测定仪测定了不同碱度实验渣在不同温度下的表面张力。结果表明,在实验渣成分范围内,随着温度的升高,熔渣表面张力呈线性逐渐降低,温度升高100℃...根据结晶器保护渣组成与成分范围,在实验渣成分设计的基础上,采用静滴法,利用渣金界面性质测定仪测定了不同碱度实验渣在不同温度下的表面张力。结果表明,在实验渣成分范围内,随着温度的升高,熔渣表面张力呈线性逐渐降低,温度升高100℃,熔渣表面张力约可降低215 m N/m,且熔渣表面张力的降低主要取决于温度升高所导致的离子间作用力减弱。随着碱度的增加,熔渣表面张力逐渐升高,其变化趋势与熔体聚合程度降低的趋势相一致。展开更多
文摘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.
文摘根据结晶器保护渣组成与成分范围,在实验渣成分设计的基础上,采用静滴法,利用渣金界面性质测定仪测定了不同碱度实验渣在不同温度下的表面张力。结果表明,在实验渣成分范围内,随着温度的升高,熔渣表面张力呈线性逐渐降低,温度升高100℃,熔渣表面张力约可降低215 m N/m,且熔渣表面张力的降低主要取决于温度升高所导致的离子间作用力减弱。随着碱度的增加,熔渣表面张力逐渐升高,其变化趋势与熔体聚合程度降低的趋势相一致。
