Thermoelectric properties of Ca3-xEuxCo 4O9+δ (0≤x≤0.1)

Ankam Bhaskar; Y. C. Huang; Chia Jyi Liu

doi:10.1016/j.ssc.2013.06.006

Thermoelectric properties of Ca_3-xEu_xCo ₄O_9+δ (0≤x≤0.1)

Ankam Bhaskar, Y. C. Huang, Chia Jyi Liu

Department of Physics

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

Ca_3-xEu_xCo₄O_9+δ (x=0.00, 0.05 and 0.10) samples were prepared by conventional solid-state synthesis and their properties measured at 25-300 K. The x-ray diffraction (XRD) patterns revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The total thermal conductivity values decreased monotonically with increasing Eu3+ content. Ca_2.95Eu _0.05Co₄O_9+δ had the highest dimensionless figure of merit of 0.038 at 300 K, representing an improvement of about 52% compared to undoped Ca₃Co₄O_9+δ.

Original language	English
Pages (from-to)	24-27
Number of pages	4
Journal	Solid State Communications
Volume	168
DOIs	https://doi.org/10.1016/j.ssc.2013.06.006
Publication status	Published - 2013 Jan 1

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All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Cite this

Bhaskar, A., Huang, Y. C., & Liu, C. J. (2013). Thermoelectric properties of Ca_3-xEu_xCo ₄O_9+δ (0≤x≤0.1). Solid State Communications, 168, 24-27. https://doi.org/10.1016/j.ssc.2013.06.006

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abstract = "Ca3-xEuxCo4O9+δ (x=0.00, 0.05 and 0.10) samples were prepared by conventional solid-state synthesis and their properties measured at 25-300 K. The x-ray diffraction (XRD) patterns revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The total thermal conductivity values decreased monotonically with increasing Eu3+ content. Ca2.95Eu 0.05Co4O9+δ had the highest dimensionless figure of merit of 0.038 at 300 K, representing an improvement of about 52{\%} compared to undoped Ca3Co4O9+δ.",

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AB - Ca3-xEuxCo4O9+δ (x=0.00, 0.05 and 0.10) samples were prepared by conventional solid-state synthesis and their properties measured at 25-300 K. The x-ray diffraction (XRD) patterns revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The total thermal conductivity values decreased monotonically with increasing Eu3+ content. Ca2.95Eu 0.05Co4O9+δ had the highest dimensionless figure of merit of 0.038 at 300 K, representing an improvement of about 52% compared to undoped Ca3Co4O9+δ.

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10.1016/j.ssc.2013.06.006