Abstract
The thermodynamic properties of liquid (Au–Sb–Sn) alloys were studied with an electromotive force (EMF) method using the eutectic mixture of KCl/LiCl with addition of SnCl2 as a liquid electrolyte. Activities of Sn in the liquid alloys were measured at three cross-sections with constant molar ratios of Au:Sb=2:1, 1:1, and 1:2 with tin in the concentration range between 5at.% and 90at.% from the liquidus of the samples up to 1073K. The integral Gibbs excess energies and the integral enthalpies at 873K were calculated by Gibbs–Duhem integration. Additionally liquid Au–Sb alloys have been measured at 913K with the EMF method as no reliable data for the Gibbs excess energies have been found in literature. The eutectic mixture of KCl/LiCl with addition of SbCl3 has been used as an electrolyte for the measurements. The Gibbs excess energies from the (Au+Sb) system were necessary for the integration of the thermodynamic properties of the ternary (Au+Sb+Sn) system.
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