Calculating models of mass action concentration for metallic melts Ag---In---Sn

Based on the phase diagrams, measured activities and in the light of mass action law as well as the coexistence theory of metallic melts involving compound formation, calculating models of mass action concentrations for metallic melts Ag---In, Ag---Sn In---Sn and Ag---In---Sn have been formulated. The calculated results agree well with experimental values, showing that the models formulated can embody the structural characteristics of the corresponding melts. It is clear from the calculation, that when activities of a binary system involving peritectic exhibit negative deviation relative to Raoultʹs law, a single phase calculating model will give best agreement with experiments; and correspondingly, for ternary metallic melts formed from three binary systems involving peritectic, a single phase calculating model should also be used to evaluate their mass action concentrations.