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  

• 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

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Identifiers

DOI

10.12693/APhysPolA.115.909