Home > Publications database > Analysis of Charge Transport in Ce 0.8 Gd 0.2-x Pr x O 2-δ at T ≤ 600°C > print

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100 1 _ |a Neuhaus, Kerstin
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245 _ _ |a Analysis of Charge Transport in Ce 0.8 Gd 0.2-x Pr x O 2-δ at T ≤ 600°C
260 _ _ |a Pennington, NJ
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|b Electrochemical Soc.
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520 _ _ |a Doped ceria pellets with the composition Ce0.8Gd0.2-xPrxO2-δ with x = 0.15, 0.1, 0.05, and 0.03 were investigated with a special focus on the partial conductivities in the temperature range of 200–600°C. Temperature dependent conductivity provided by impedance spectroscopy in air was compared to measurements of the oxygen partial pressure dependent electronic conductivity. The electronic conductivity was analyzed down to 200°C by using a modified Hebb-Wagner setup with encapsulated Pt microcontacts. A small polaron hopping process introduced by reduction of praseodymium was found to have a pronounced influence on the electronic conductivity at low temperatures. A splitting of the maximum introduced by praseodymium small polaron hopping was observed. Especially for the compositions x ≤ 0.1, a strong deviation of the electronic conductivity curves from the standard acceptor doping case was measured due to superimposed electronic conductivity from the Pr3+/4+ redox reaction.
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700 1 _ |a Eickholt, Sebastian
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700 1 _ |a Maheshwari, Aditya
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700 1 _ |a Wiemhöfer, Hans-Dieter
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773 _ _ |a 10.1149/2.0931707jes
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