Synthesis and Characterization of Samarium-Doped CeO2 Powders as a Solid Electrolyte by Using Pechini Method
A. Arabaci
Istanbul University, Faculty of Engineering, Department of Metallurgical Engineering, Avcilar 34320, Istanbul, Turkey
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In the trivalent rare-earth doped ceria electrolyte for SOFC applications, the highest conductivities are observed for Ce1-xSmxO2-x/2 and Ce1-xGdxO2-x/2. In this study, fully dense samarium doped ceria ceramics (SDC), SmxCe1-xO2-x/2 (x=0.1) have been synthesized via Pechini method. The phase identification, microstructural properties and bond structure of SDC samples were studied by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform- Infrared Spectroscopy (FTIR). The XRD results indicate that a single-phase fluorite structure has formed at relatively low calcination temperature of 500°C. This method yields high purity ultrafine powders which can form: dense electrolyte at relatively low sintering temperatures. The SEM results show that a complete solid solution between ceria and samarium was obtained at the sintering temperature of 1400°C.

DOI: 10.12693/APhysPolA.127.888
PACS numbers: 88.30.M-