Subsolidus phase equilibria in the GdFeO3 SrFeO3 system in air
Abstract The paper considers phase equilibria in the subsolidus region of the GdFeO3 SrFeO3 d system in air. By using X ray powder diffraction, SEM/EDS, and Mossbauer spectroscopy, a GdFeO3 SrFeO3 d phase diagram was constructed in the 1300 1500 degC temperature range. The samples of Gd1 xSrxFeO3 a for this study were synthesized by solid phase chemical reactions. The study of phase equilibria in the GdFeO3 SrFeO3 d system showed the presence of three areas, that is, of solid solutions based on the strontium poor GdFeO3 orthorhombic phase, of the strontium rich SrFeO3 d cubic phase, as well as of an intermediate region in the mixture of these phases. The miscibility gap width (Dx) decreases from 0.54 to 0.35 with an increase in temperature from 1300 to 1500 degC.