Preparation and Microstructure of (La<sub>0.5</sub>Sm<sub>0.5</sub>)<sub>2</sub>(Zr<sub>0.7</sub>Ce<sub>0.3</sub>)<sub>2</sub>O<sub>7</sub><sub> </sub>Ceramics Prepared by Chemical Coprecipitation Method

Abstract

Ceramic materials of (La0.5Sm0.5)2(Zr0.7Ce0.3)2O7 composition powder was synthesized by chemical coprecipitation method using Sm2O3, La2O3, Ce (NO3)3·6H2O and ZrOCl2·8H2O powders as raw materials. Microstructure and phases of (La0.5Sm0.5)2(Zr0.7Ce0.3)2O7 (LSZCO) powder was examined by Transmission Electron Microscope (TEM) and X-ray diffraction (XRD). The specific surface area of powders were determined by BET specific surface area test. The structure of LSZCO powder remained in pyrochlore with the increase of temperature more than 1200 °C. According to the impact on the specific surface area of LSZCO powder, the factors of the process is ordered in descending sequence as follows: pH value, dispersant content, concentration of reactants, the reaction temperature.