Thermodynamic analysis of the possibility of using melts of the BaO-Na2O-Fe2O3 system for growing barium hexaferrite crystals

The results of the BaO-Na2O-Fe2O3 system study are presented in the article. The thermodynamic parameters were selected and optimized for simulatig the phase equilibria realized in this system according to the experimental data. A user database for calculations using the software package “FactSage” has been produced. With that software package “FactSage” phase diagrams of oxide systems have been calculated. The results for the systems BaO-Fe2O3, Na2O-Fe2O3, BaO-Na2O are presented in the form of T-x diagrams. For the BaO-Na2O-Fe2O3 system, the results are presented in the form of isothermal and polythermal sections, and also in the form of a liquidus surface. It is shown that the results of the studies (concentrations and temperature ranges) can be used in crystal growth process. The obtained results will be in demand for a effective choice of the parameters for hexagonal ferrites crystals flux growth.