Preparation and properties of BaCe1-xYxO3- based composites with Ba–Ce–Y–Si–P–O glass

Abstract The aim of this work was to determine the influence of glassy Ba–Ce–Y–Si–P–O phase, prepared by sol-gel method and introduced into the BaCe0.9Y0.1O3 host material on the selected properties of obtained materials. Three composite materials with different content of modifying phase (3, 6 and 18 wt%) were prepared. It was found that the introduction of an additional amorphous phase leads to the decrease of the electrical conductivity in the measured temperature range, both in grain interior and grain boundary regions. The observed change of conduction mechanism can be explained by the modification of the chemical composition of BaCe0.9Y0.1O3 due to reaction with modifying phase at the stage of material preparation. Based on obtained results further optimisation of modifier phase composition and the preparation conditions leading to the materials with improved properties can be proposed.