Thermoelectric properties of Ca2.95Bi0.05Co 4-xFexO9+δ (0 ≤ x ≤ 0.15)

Ankam Bhaskar, Z. R. Lin, Chia-Jyi Liu

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17 Citations (Scopus)

Abstract

Polycrystalline samples of Ca2.95Bi0.05Co 4-xFexO9+δ (x = 0.00, 0.05, 0.10, and 0.15) are prepared by conventional solid-state synthesis. The XRD results show that all the samples are single phase. The thermopower of all the samples is positive, indicating that the predominant carriers are holes over the entire temperature range. The electrical resistivity and thermopower decrease with increasing Fe content. Among all the samples, Ca 2.95Bi0.05Co3.95Fe0.15O 9+δ exhibits the highest dimensionless figure of merit of 0.064 at 300 K. These results suggest that the Fe is an effective doping element for improving the thermoelectric properties of Ca 2.95Bi0.05Co4O9+δ.

Original languageEnglish
Pages (from-to)63-67
Number of pages5
JournalEnergy Conversion and Management
Volume76
DOIs
Publication statusPublished - 2013 Aug 19

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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