Preparation, structure and electrical conductivity of the pyrochlore-type phase Sm2Zr2O7 codoped with bivalent magnesium and trivalent dysprosium cations

► Dense SmDy1−xMgxZr2O7−x/2 ceramics were firstly prepared by pressureless-sintering. ► The total conductivity of SmDy1−xMgxZr2O7−x/2 increases with increasing temperature. ► SmDy1−xMgxZr2O7−x/2 ceramics are oxide-ion conductors in low oxygen partial pressure. ► SmDy1−xMgxZr2O7−x/2 ceramics have a similar value of the total conductivity at 1073-1173 K.