Abstract
The isobaric method with an alumina capsule has been developed to measure the activity of manganese in liquid Fe-Mn alloys at a satisfactory equilibrium state. The measurements have been made at 1843 K for NMn=0.09∼0.77. The activity of manganese shows a slight positive deviation from Raoult’s law, and the activity coefficient of manganese, γMn, is expressed by the following equation:
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oindentThe attivity coefficient of manganese, γMn°, and the interaction parameter, εMn(Mn), at infinite dilute solution are 1.45 and −0.74, respectively.
These results were in good agreement with the results of Sanbongi et al. obtained by the electromotive force method and those of Steiler et al. by the transportation method.
