Influence of Eu Substitution for Y on the High Temperature Electric Transport Properties of YBaCo4O7+δ

Qing Lin He; Feng Gao; Hong Zhang Song; Xing Hu

doi:10.4028/www.scientific.net/AMR.724-725.1029

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 724-725Influence of Eu Substitution for Y on the High...

Influence of Eu Substitution for Y on the High Temperature Electric Transport Properties of YBaCo₄O_7+δ

Abstract:

The electric resistivity, Seebeck coefficients and power factors of Y_1-xEu_xBaCo₄O_7+δ (x = 0.0, 0.05, 0.1, 0.2) ceramics were investigated from 400K to 1000K. The results show that the presence of Eu decreases electrical resistivity, and has little effect on Seebeck coefficients of the samples. The activation energy of conductivity is calculated by the Arrhenius plots in the semiconductive region. According to power factors, the optimum Eu substitution amount is x = 0.1, which results in a higher power factor of 67.5 μWm^-1K^-2 at 1000K, 30% higher than unmodified sample YBaCo₄O_7+δ.

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Advanced Materials Research (Volumes 724-725)

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1029-1032

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https://doi.org/10.4028/www.scientific.net/AMR.724-725.1029

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August 2013

Authors:

Qing Lin He, Feng Gao, Hong Zhang Song, Xing Hu

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Electric Transport, Y_1-xEu_xBaCo₄O_7+δ

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