Influence of Calcining Atmosphere on Synthesis of Mixed Conducting Oxides SrFeCo_0.5O_y by Citrates Sol-Gel Method

Abstract:

Mixed conducting oxides SrFeCo_0.5O_y was synthesized by citrates sol-gel method. The effect of calcining atmosphere on synthesis process of samples was studied. The crystal structure and morphology of calcined powders were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM) and the bulk density of sintered samples was determined by Archimedes method. The experimental results showed that the dominant phase perovskite Sr-Fe-Co-O oxides was prepared by calcining in oxygen. The powder obtained had flake shape and the particle was smaller. The dominant phase orthorhombic Sr-Fe-Co-O oxides was prepared by calcining in argon. The powder obtained had sphere shape and the particle was bigger. The bulk density of samples sintered at low temperature in oxygen was smaller than that of in argon. The reaction mechanism of samples calcined in different atmosphere was also discussed.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 1205-1209
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.1205
• Online since: December 2011
• Authors: Qing Yang Du, Hui Jun Xu
• Keywords: Calcining Atmosphere, Inorganic Synthesis, Sol-Gel (SG), Strontium Iron Cobalt Oxide

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