Study of Reactions in the Solid Phase Leading to the Formation of SrSn0.9Mn0.1O3 Perovskite Oxide

Abstract

The perovskite solid solution described by the formula SrSn0.9Mn0.1O3 was obtained through a solid-state reaction. Thermal decomposition processes and the reaction route of the perovskite solid solution formation were studied using a thermal analysis method with help from X-ray diffraction analysis. The mechanochemical activation of initial reagents accelerates the reaction course and supports the formation of SrSnO3 and SrMnO3, which together form a solid solution at 1200 ° C. The reaction process of nonactivated initial reagents SrCO3, SnO2, and MnO2, respectively MnCO3 leads to the formation of SrSn0.9Mn0.1O3 through the formation of the intermediate phases Sr7Mn4O15 and Sr2SnO4. The color hues of the samples go from light brown to dark brown as the calcining temperature rises.