Formation of ceramic solid solutions in a SrTiO3-BiScO3 system

X-ray structural, X-ray phase, and dilatometric analyses were used to explore specific features of the formation of solid solutions in the (1 − x)SrTiO3−xBiScO3 system with x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5. It was found that the synthesis of solid solutions from the initial Bi2O3, Sc2O3, TiO2, and SrCO3 components is accompanied by a considerable increase in the linear dimensions of the samples, depending on their composition. Solid solutions with x > 0.1 are formed through intermediate phases (Sr5Bi6O14 at x = 0.2; Sr0.78Bi2.22O4 at x = 0.3; and Sr2.25Bi6.75O12.38 at x = 0.4 and 0.5). It was shown that the samples with x = 0.2, 0.3, 0.4, and 0.5 have two phases: one with a cubic Pm3m structure and one with a tetragonal I4/mcm structure.