Synthesis and Physico-Chemical Properties of La_0.9Sr_0.1Sc_{1 – x}Mn_xO_{3 – δ} Ceramic Materials with Mixed Electronic and Ionic Conductivity

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-solution series La_0.9Sr_0.1Sc_{1 – x}Mn_xO_{3 – δ}, where scandium ions in the B-cation position are gradually replaced by manganese ions, was obtained and studied for the first time. The obtained materials were certified by X-ray phase analysis, scanning electron microscopy, and energy-dispersive microanalysis. The dopant influence on the studied materials’ sintering ability and morphology is elucidated. The electrical conductivity of the solid solutions as a function of temperature and gas phase humidity was investigated by the dc four-probe method.