Synthesis and characterization of Ba0.5Sr0.5Co0.8Fe0.2O3-σ

• Published in: Rare metals 2009-02, Vol.28 (1), p.39-42
• Main Authors: Wang, Qibao, Yuan, Yan, Han, Minfang, Zhu, Peiyu
• Format: Article
• Language: English
• Subjects: Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Physical Chemistry; 固态反作用力; 氧化膜; 物理性质; 配位法; 钙钛矿氧化物
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-009-0008-4

Perovskite-type Ba0.5Sr0.5Co0.8Fe0.2O3-σ （BSCFO） powders were synthesized using two methods, solid-state reaction （SSR） method and citrate-EDTA complexing method （CC-EDTA）. Then the powders were pressed to green disks of 19 nun in diameter and sintered at 1140℃ for 5 h. The shrinkage rate and relative density of the membranes prepared from the perovskite-type powders were determined and calculated, and the powders and derived membranes were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The resuits show that the shrinkage rates of the two kinds of disks are nearly the same （about 10%）. The disks prepared by the SSR method had a bigger grain size and lower relative density than those prepared by the CC-EDTA method. The conductivity of the membranes prepared by the SSR method was about 38 S/cm, higher than that of the membranes prepared by the CC-EDTA method, which was about 30 S/cm, at the same temperature of600℃.