Mao-yuan Wang, Li-gan Qiu¤. Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 286-290. doi: 10.1088/1674-0068/21/03/286-290
Citation: Mao-yuan Wang, Li-gan Qiu¤. Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 286-290. doi: 10.1088/1674-0068/21/03/286-290

Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic

doi: 10.1088/1674-0068/21/03/286-290
Funds:  This work was supported by the National Natural Science Foundation of China (No.20771079) and the Natural Science Foundation of Education Department of Jiangsu Province (No.07KJB150126).
  • Received Date: 2007-10-16
  • Rev Recd Date: 2008-03-30
  • BaCe0.8Pr0.2O3-α ceramic was synthesized by high temperature solid-state reaction. The structural characteristics and the phase purity of the crystal were determined using powder X-ray diffraction analysis. By using the methods of AC impedance spectroscopy, gas concentration cell and electrochemical pumping of hydrogen, the conductivity and ionic transport number of BaCe0.8Pr0.2O3-α were measured, and the electrical conduction behavior of the material was investigated in different gases in the temperature range of 500-900 ffiC. The results indicate that the material was of a single perovskite-type orthorhombic phase. From 500 ffiC to 900 ffiC, electronic-hole conduction was dominant in dry and wet oxygen, air or nitrogen, and the total conductivity of the material increased slightly with increasing oxygen partial pressure in the oxygen partial pressure range studied. Ionic conduction was dominant in wet hydrogen, and the total conductivity was about one or two orders of magnitude higher than that in hydrogen-free atmosphere (oxygen, air or nitrogen).
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Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic

doi: 10.1088/1674-0068/21/03/286-290
Funds:  This work was supported by the National Natural Science Foundation of China (No.20771079) and the Natural Science Foundation of Education Department of Jiangsu Province (No.07KJB150126).

Abstract: BaCe0.8Pr0.2O3-α ceramic was synthesized by high temperature solid-state reaction. The structural characteristics and the phase purity of the crystal were determined using powder X-ray diffraction analysis. By using the methods of AC impedance spectroscopy, gas concentration cell and electrochemical pumping of hydrogen, the conductivity and ionic transport number of BaCe0.8Pr0.2O3-α were measured, and the electrical conduction behavior of the material was investigated in different gases in the temperature range of 500-900 ffiC. The results indicate that the material was of a single perovskite-type orthorhombic phase. From 500 ffiC to 900 ffiC, electronic-hole conduction was dominant in dry and wet oxygen, air or nitrogen, and the total conductivity of the material increased slightly with increasing oxygen partial pressure in the oxygen partial pressure range studied. Ionic conduction was dominant in wet hydrogen, and the total conductivity was about one or two orders of magnitude higher than that in hydrogen-free atmosphere (oxygen, air or nitrogen).

Mao-yuan Wang, Li-gan Qiu¤. Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 286-290. doi: 10.1088/1674-0068/21/03/286-290
Citation: Mao-yuan Wang, Li-gan Qiu¤. Mixed Conduction in BaCe0.8Pr0.2O3-α Ceramic[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 286-290. doi: 10.1088/1674-0068/21/03/286-290

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