Application of a γ attenuation technique for the study of phase equilibria in binary liquid systems with a miscibility gap
Rashid Khairulin, Sergei Stankus
A description of a γ attenuation method for the study of phase equilibria in binary liquid systems with a miscibility gap is given. New data on the two-melt phase boundary of the lead – gallium system are presented. According to the measurements the coordinates of the critical point of the liquid – liquid coexistence curve are: critical temperature Tc = 879.3 ± 1.5 K; critical composition Xc = 41.9 ± 1.0 at% Pb. The data on the behaviour of the coexistence curves of the In – Al, Bi – Zn, Pb – Cu, and Pb – Ga liquid systems are summarised and discussed. The most likely value of the critical exponent β of the coexistence curve for these systems is shown to lie in the range 0.31 – 0.32. A possibility to use the method for the study of liquid – vapour equilibria is demonstrated.