Synthesis and physico-chemical properties La_0.9Sr_0.1Sc_{1 – x}Mn_xO_{3 – δ} ceramic materials with mixed electron and ion conductivity

Abstract

Perovskite-like materials with mixed ionic and electronic conductivity are considered as promising functional materials for proton-ceramic electrochemical devices. In the present work, a solid solutions series La0.9Sr0.1Sc1 – xMnxO3 – δ, where B-cation position scandium ions are gradually replaced by manganese ions, was obtained and studied in first time. The obtained materials were certified by X-ray phase analysis, scanning electron microscopy, and energy-dispersive microanalysis. The dopant influence on the sinterability and morphology researched materials is shown. The solid solutions electrical conductivity as a function of temperature and gas phase humidity were investigated by direct current four-probe method.