M0.9Y0.1O2–δ–BiScO3 (M = Zr, Ce) — Preparation, Structure, and Ionic Conductivity

Samples of the solid solutions Zr0.9Y0.1O2–δ–BiScO3 and Ce0.9Y0.1O2–δ–BiScO3 were obtained by solid-phase synthesis. X-ray diffraction revealed that the system Zr0.9Y0.1O2–δ–BiScO3 corresponds to a tetragonal structure with space symmetry group P42/nmc. The ceramic Ce0.9Y0.1O2–δ–BiScO3 is two-phase and is characterized by a cubic structure with space symmetry group Fm3¯m\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$Fm\overline{3 }m$$\end{document} and Ia–3. It was ascertained by means of impedance spectroscopy that the system Ce0.9Y0.1O2–δ–BiScO3 has the highest electrical conductivity, but the activation energy is lower in the ceramic Zr0.9Y0.1O2-δ–BiScO3, equal to 0.3 eV in the temperature range 420 – 680°C. The activation energy of the solid solution Ce0.9Y0.1O2–δ–BiScO3 is equal to 1.0 eV.