Thermodynamic Properties of CaCl<sub>2</sub>-CaF<sub>2</sub>-CaO System: Phase Diagram Investigation

The CaCl2-CaF2-CaO phase diagram was investigated in the CaO low region (2-CaF2 and CaCl2-CaO binary diagrams, constituting ternary system, were first studied by Differential Scanning Calorimetry (DSC) measurements X-Ray Diffraction (XRD) characterization; a good agreement obtained between models calculated with FactSage® software (FTsalt database) present experimental data. As CaF2-CaO liquidus could not be measured DSC due to high melting temperature, this using FTsalt database combined FToxid of software. calculations exhibits an eutectic at composition (78.2-15.7-6.1 mol.%) 637°C, five peritectic points. Measurements relevant vertical cross-sections for three CaCl2-CaF2 compositions (50-50, 40-60 30-70 up 18 mol.% are model. For each section, temperature is constant around 11 then sharply increases. Moreover, increase CaF2 content melt leads decrease solubility isothermal condition.