| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1489237 | Materials Research Bulletin | 2013 | 5 Pages |
•Effects of Sr doping on electrical properties and structure were investigated.•The samples have higher conductivity and low activation energy.•Cause of increase oxygen vacancy concentration in the grain boundary.
The effects of Sr doping on the electrical properties of Ce0.75(Gd0.95−xSrxCa0.05)0.25O2−δ (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05 mol%) electrolytes thick films were investigated. The samples sintered at 1400 °C for 8 h. X-ray diffraction (XRD) showed typical XRD patterns of a cubic fluorite structure, and the ionic conductivity was examined by AC impedance spectroscopy. From the experimental results, it was observed that Ce0.75(Gd0.95−xSrxCa0.05)0.25O2−δ (x = 0.04 mol%) electrolytes thick film have higher conductivity and minimum activation energy at 600 °C. This is explained in terms of the increased in the oxygen vacancy concentration at the grain boundary.
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