Electrical Properties of Co-Doped Ceria Electrolyte Ce_{0.8-x}Gd_{0.2}Sr_{x}O_{2-δ} (0.0 ≤ x ≤ 0.1)

• Authors: S. Ramesh , C. Vishnuvardhan Reddy
• Languages of publication: EN

Abstracts

EN

Effects of strontium doping on electrical properties of gadolinium-doped ceria were investigated. The Ce_{0.8-x}Gd_{0.2}Sr_{x}O_{2-δ} (0.0 ≤ x ≤ 0.1) compositions were prepared by sol-gel method and sintered at 1300°C for 8 h, the bulk densities were over 93% of theoretical density. These results were consistent with scanning electron microscope. The crystallite size of these materials was determined using the X-ray powder diffractometer and the sizes range from 19.4 nm to 24.4 nm. From the experimental results, it was observed that the composition Ce_{0.8-x}Gd_{0.2}Sr_{x}O_{2-δ} (x=0.02) exhibits higher conductivity (23.6× 10^{-3} S cm^{-1}) and minimum activation energy (0.83 eV) at 700°C. This composition is thus a potential candidate for use as electrolyte applications in intermediate temperature solid oxide fuel cells.

Keywords

EN

65.40.De; 66.10.Ed; 81.20.Fw; 82.45.Gj; 82.47.Ed; 82.45.Xy

Discipline

• 82.47.Ed: Solid-oxide fuel cells (SOFC)
• 65.40.De: Thermal expansion; thermomechanical effects
• 66.10.Ed: Ionic conduction
• 82.45.Gj: Electrolytes(for polyelectrolytes, see 82.35.Rs and 82.45.Wx; see also 66.30.H- Self-diffusion and ionic conduction in nonmetals)
• 81.20.Fw: Sol-gel processing, precipitation(for reactions in sol-gels, see 82.33.Ln; for sol-gels as disperse system, see 82.70.Gg)
• 82.45.Xy: Ceramics in electrochemistry(see also 81.05.Je Ceramics and refractories, and 81.05.Mh Cermets, ceramic and refractory composites in specific materials)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 5
• Pages: 909-913

Dates

published

2009-05

received

2009-01-30

(unknown)

2009-03-30

Contributors

author

S. Ramesh

• Department of Physics, University College of Science, Osmania University, Hyderabad, 500 ,007 India

author

C. Vishnuvardhan Reddy

• Department of Physics, University College of Science, Osmania University, Hyderabad, 500 ,007 India

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Identifiers

DOI

10.12693/APhysPolA.115.909