Study of the ternary system Cs₂O–V₂O₅–MoO₃ and its triangulation

The main task of physicochemical analysis is the study of multicomponent systems. Knowledge of phase levels and their regularities in multicomponent systems is necessary for the development of optimal conditions for the search for compositions with given conditions. For this purpose, we studied the ternary system Cs₂O–V₂O₅–MoO₃. Based on the results of experimental studies, the first promising areas of the phase diagram for the synthesis of vanadium‒molybdenum bronzes of cesium were obtained. Compositions obtained on the basis of the system are promising in the development of new materials, in particular: anti‒corrosion coatings, ion‒electronic conductors with high activity. Theoretically, based on the results of the data obtained, it was proved that the synthesis of new materials from complex oxide phases by crystallization methods from a solid‒phase fusion melt can be used to break down a three‒component oxide system Cs₂O–V₂O₅–MoO₃, to identify topology patterns and phase formation in them. The topological image of the phase diagram constructed by a combination of data from its faceting elements is characterized by the presence of three congruent and four incongruently melting binary compounds on the faces, which divide it into four subsystems (I–IV), the most interesting, in our opinion, variants of triangulation of this system, according to which it was identified in triangulating sections, which divide it into 10 subsystems, which are quasi‒three‒component and triple systems, hence, they can be studied independently. For the convenience of performing extreme work both on the synthesis of individual compounds (D1–D3) and thermal analysis of systems, a set of methods of physical and chemical analysis was used. In particular, visual polythermic, differential thermal analysis. Finally, the main thing in this work is the prediction, modeling and experimental confirmation of phase formation in the system Cs₂O–V₂O₅–MoO₃ , its stable and metastable processes, which will make it possible to maximize the mechanism of the conditions for the formation and decay of the qualitative and quantitative composition of the phases.