Preparation, structure and electrical conductivity of pyrochlore-type Gd1–xEu2xSm1–xZr2O7 ceramics with a constant lattice parameter

Publication year: 2011
Source: Electrochimica Acta, In Press, Accepted Manuscript, Available online 13 June 2011

Zhan-Guo, Liu , Jia-Hu, Ouyang , Ke-Ning, Sun , Yu, Zhou , Jun, Xiang

A novel series of Gd1–xEu2xSm1–xZr2O7 (x=0, 1/3, 1/2, 2/3, 1) ceramics with a constant lattice parameter are prepared by solid state reaction, and are then evaluated as possible solid electrolytes. The microstructure and electrical properties of Gd1–xEu2xSm1–xZr2O7 ceramics have been investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and complex impedance analysis. Gd1–xEu2xSm1–xZr2O7 ceramics exhibit a single phase of pyrochlore-type structure. The total conductivity of Gd1–xEu2xSm1–xZr2O7 ceramics obeys the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173K. At 973–1173K, the composition has little effect on electrical conductivity of Gd1–xEu2xSm1–xZr2O7 ceramics. Gd1–xEu2xSm1–xZr2O7 ceramics are…