PREPARATION, STRUCTURE AND IONIC CONDUCTIVITY OF THE M0.9Y0.1O2–?–BiScO3 (M = Zr, Ce)

Abstract

Samples of Zr0.9Y0.1O2–?–BiScO3 and Сe0.9Y0.1O2–?–BiScO3 solid solutions were obtained by solid-phase synthesis. X-ray diffraction revealed that the Zr0.9Y0.1O2–?–BiScO3 system corresponds to a tetragonal structure with space symmetry group P42/nmc. The Сe0.9Y0.1O2–?–BiScO3 ceramics is two-phase and is characterized by a cubic structure with space symmetry groups and Ia–3. Using the impedance spectroscopy method, it was found that the Сe0.9Y0.1O2–?–BiScO3 system has the highest electrical conductivity, however, the activation energy is lower in the Zr0.9Y0.1O2–?–BiScO3 ceramics, amounting to 0.3 eV in the temperature range of 300–420 ?С and 0.7 eV in the temperature range 420–680 ?С. The activation energy of the Сe0.9Y0.1O2–?–BiScO3 solid solution is 1.0 eV.