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Journal of Materials Science: Materials in Electronics

Published in:

01-08-2013

Thermoelectric properties of GdBaCo_2−xFe_xO_5+δ ceramics

Authors: Feng Gao, Jing Zhang, Hongzhang Song, Zhen Qin, Delin Yang, Xing Hu

Published in: Journal of Materials Science: Materials in Electronics | Issue 8/2013

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Abstract

The influence of Fe doping on the lattice structure and thermoelectric properties of GdBaCo_2−xFe_xO_5+δ (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) ceramics was studied from room temperature to 525 K. The results show that presence of Fe will increase both electrical resistivity and Seebeck coefficients of the samples. Due to the lattice misfit and carrier concentration reduction caused by Fe, the thermal conductivity of the sample decreases. The activation energy of conductivity is larger than that of thermopower calculated in the semiconductive region, which means that the conduction mechanism may be determined as a small polaron hopping model. The optimum Fe doping amount is x = 0.6, which results in a ZT value 0.02 at 373 K.

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Title: Thermoelectric properties of GdBaCo2−x Fe x O5+δ ceramics
Authors: Feng Gao
Jing Zhang
Hongzhang Song
Zhen Qin
Delin Yang
Xing Hu
Publication date: 01-08-2013
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 8/2013
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-013-1216-0

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