Subsolidus phase relations in the SrO–CuO–TiO2 ternary system at 950 °C in air

Abstract We report the subsolidus phase relations in the SrO–CuO–TiO 2 ternary system at 950 °C in air. For this study, numerous samples of various nominal compositions were prepared by the solid state reaction, and their equilibrium phases were analyzed by powder X-ray diffraction (XRD). On the basis of our XRD analysis data and previous reports on the SrO–CuO, CuO–TiO 2 , and SrO–TiO 2 binary phase diagrams, subsolidus phase diagram of the SrO–CuO–TiO 2 ternary system could be completely constructed. Instead of the stoichiometric SrCu 3 Ti 4 O 12 compound, new ternary compounds of Sr 0.9639(1− y ) Cu 3.0361(1−3 y ) Ti 4+2 y O 12 -type solid solutions were found to exist and their solubility limit was 0 ⩽  y  ⩽ 0.0235 at 950 °C in air.