system

The paper presents a theoretical and experimental study of the three-component mutual system Na+ ,Sr2+||F- ,WO4 2-. In the theoretical part, geometric modeling of phase complex is carried out. The thermodynamic method, according to Hess’s law, confirmed the partition variant with three phase triangles NaF – SrF2 – SrWO4 , NaF – 2NaF•Na2 WO4 – SrWO4 , 2NaF•Na2 WO4 – SrWO4 – Na2 WO4 . In accordance with the chosen partition option, the simulation of the liquidus variants of the three-component mutual system Na+ ,Sr2+||F- ,WO4 2- has been carried out.

Silver thiostannates and chalcostannates are widely used as promising functional materials which have semiconductor, thermoelectric, and photoelectric properties. The goal of this research is to study the Ag2SnS3-Sb2S3 phase diagram and determine the boundaries of solid solutions based on both components. Alloys were investigated using methods of physicochemical analysis. Based on the results of the study, a condition diagram of the Ag2SnS3-Sb2S3 system was constructed.