Influence of Ceria Doping on Oxygen Relaxation and Oxide Ion Conduction in Yttria Stabilized Cubic Zirconia

Abstract

We have examined the oxygen relaxation and oxide ion conduction in yttria stabilized cubic zirconia, and the influence of the doped ceria content. Two maxima of the internal friction (IF) were observed for some CeO2 doped cubic Zr0.8−xCexY0.2O1.9 ceramics in the temperature range of 25~420 and at 9Hz using forced torsion method. The ceria addition reduced the amplitude of IF and the oxide ion conduction of Zr0.8−xCexY0.2O1.9. The result indicated that the doped CeO2 reduced the mobility of oxygen in yttria stabilized cubic zirconia even with the same concentration of defects.