Abstract
Phase diagram of the PbCl2-ZnCl2 binary system has been determined and compared to the previous ones. In addition, the density of the PbCl2-ZnCl2 binary melt has been measured as accurately as possible by the Archimedean method with two spherical sinkers made of platinum of different sizes. The results obtained are summarized as follows: Phase diagram of the PbCl2-ZnCl2 binary system shows an eutectic at 23 mol% PbCl2, 286°C and an inflection of the liquidus in the composition range of 40∼50 mol% PbCl2.
Density shows an approximately linear decrement with rising temperature. Molar volume deviates negatively from the additivity over the entire system. There are inflection points at about 50 mol% PbCl2 for the plots of thermal expansion coefficient and temperature coefficient of density vs. composition. This may indicate some structural change in the PbCl2-ZnCl2 melt.
