Optimization of synthesis conditions for rare-earth titanate based oxygen ion conductors

► Effect of synthesis temperature on the bulk and gb conductivity of the Ca-doped REE titanates ► A considerable gb segregation of Ca-containing phase at 1550 °C ► Homogeneous and non-homogeneous co-precipitation for synthesis of the (Dy0.8Ca0.1Tb0.1)2Ti2O7 − δ ► The bulk and gb conductivity of (Dy0.8Ca0.1Tb0.1)2Ti2O7 − δ are independent of the precipitant type.