Structural, Dielectric, Electrical, and Thermal Properties of the Ce-Doped Ba2TiMoO6 Double Perovskite

Abstract

Ce-doped Ba2TiMoO6 with different Ce percentage was synthesized by solid state reaction and investigated. Electrical and thermal properties were examined by using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), and photothermal deflection (PTD) technique. The electrical investigation shows that the increase of Ce doping percentage favors the electrical confinement which leads to a decrease in the electrical capacitance from 2.6 nF to 1.6 nF, an increase in the grain boundaries resistance from 5.88 × 107 to 6.50 × 108 X, a decrease in the current density from 60 nA to 3 nA, and a decrease of thermal conductivity from 1.8 W m-1 K-1 to 0.12 W m-1 K-1. These results introduce the Ce-doped Ba2Ti-MoO6 perovskite as a potential candidate for a new generation of thermal barrier coatings (TBCs).