Thermoelectric properties of Ca3-xDyx Co 4O9+δ with x=0.00, 0.02, 0.05, and 0.10

Ankam Bhaskar, C. S. Jhang, Chia Jyi Liu

研究成果: Article

13 引文 斯高帕斯(Scopus)

摘要

Polycrystalline samples of Ca3-x Dy x Co 4O9+δ (x = 0.00, 0.02, 0.05, and 0.10) have been prepared by conventional solid-state synthesis. The x-ray diffraction (XRD) results revealed that all the samples are single phase. The thermoelectric properties were measured at 25 K to 300 K. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The electrical resistivity of all the samples exhibited the nonmetal-to-metal transition at below 75 K. The electrical resistivity decreased and the thermopower increased with increasing Dy3+ content. Among all the samples, Ca2.9Dy0.10Co4O 9+δ had the highest dimensionless figure of merit of 0.044 at 300 K.

原文English
頁(從 - 到)2582-2586
頁數5
期刊Journal of Electronic Materials
42
發行號8
DOIs
出版狀態Published - 2013 八月 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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