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Electrical and structural properties of Ce-0.8(Sm0.5-xY0.5Alx)(0.2)O2-delta ceramics as an electrolyte for SOFC
- Issue Date
- Oct-2014
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Ceramics; Impedance spectroscopy; X-ray diffraction; Electrical properties; Ionic conductivity
- Citation
- MATERIALS RESEARCH BULLETIN, v.58, pp 195 - 198
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 58
- Start Page
- 195
- End Page
- 198
- ISSN
- 0025-5408
1873-4227
- Abstract
- The effects of various contents of alumina co-doping on a ceria-based electrolyte were investigated. All samples were sintered at 1500 degrees C for 10 h. The X-ray diffraction (XRD) patterns showed a fluorite cubic structure. To investigate the surfaces of the Ce-0.8(Sm0.5-xY0.5Alx)(0.2)O2-delta (CSYA) ceramics by scanning electron microscopy (SEM), the electrical properties of the CSYA ceramics were measured by AC impedance. The optimal values of ionic conductivity and activation energy were reached at x=0.4 measured at 600 degrees C. This result indicated that the alumina co-doping improved the electrical and microstructural properties of the ceria-based electrolyte. (C) 2014 Elsevier Ltd. All rights reserved.
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