Structure and Ionic Conductivity of Ln2Zr2O7-Type Rare Earth Zirconates
Three rare earth zirconates (Sm2Zr2O7, Gd2Zr2O7 and Er2Zr2O7) were prepared by solid state reaction. The crystal structure and ionic conductivity of these zirconates were characterized by X-ray diffraction (XRD) and complex impedance spectroscopy. The results show that Sm2Zr2O7 exhibits single-phase pyrochlore structure and Er2Zr2O7 exhibits single-phase fluorite structure, while Gd2Zr2O7 has pyrochlore and fluorite structure. Among three zirconates, the ionic conductivity of Sm2Zr2O7 is highest, while that of Er2Zr2O7 is lowest.
Wei Pan and Jianghong Gong
R. Zhang, Q. Xu, W. Pan, C. L. Wan, L. H. Qi, H. Z. Miao, "Structure and Ionic Conductivity of Ln2Zr2O7-Type Rare Earth Zirconates", Key Engineering Materials, Vols. 336-338, pp. 420-423, 2007