Based on the extended UNIQUAC equation which is commonly used to calculate the liquid activity coefficients of volatile electrolyte system, the 揼roups of species?was proposed to replace the real species and it makes the number of interaction parameters used in the equation for the multicomponent volatile electrolyte system obviously reduced.

The purpose of present work is to obtain the activity interaction coefficients between solute components in these melts.

Calculation and application for activity interaction parameters of Sn-Ce-Me lead-free solder slloys;

The calculating models for activity and activity interaction parameter in ternary metallic melts were established.

The activity interaction parameters between alloying elements and P in liquidFe at 1873K were obtained by the thermodynamic calculation.

The solubility of carbon in Mn-Fe-C melts was measured experimentally at different temperatures to obtain the activity interaction coefficients in Mn-Fe-C melts.

The formulas for prediction of activity interaction coefficients have been dirtyed by ues of a general solution model.

8525 Np The interaction coefficients between Mn and C,P and C in this melt were obtained as follows: ε_C ￣(Mn)=-1.

Use the electric conductivity to assay the activity coefficient of KCl and NaCl in H_2O;

Measurement method of activity coefficient of electrolyte solution;

Study on the activity coefficient of Rare Earths salt YCl_3 in DMF and H_2O with conductivity method at 298K;