Thermoelectric properties of Ca3Co4-xMn xO9+δ with x = 0.00, 0.05, 0.10, and 0.15

Ankam Bhaskar, Chia-Jyi Liu, Li Chen Huang

Research output: Contribution to journalArticle

Abstract

Ca3Co4-xMnxO9+δ (x = 0.00, 0.05, 0.10, and 0.15) sample were prepared by conventional solid state synthesis. The thermoelectric properties were measured at 15 K-300 K. The XRD results revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers were holes over the entire temperature range. Both the electric resistivity and the thermopower increased with increasing Mn content. Ca3Co 3.95Mn0.05O9+δ had the highest power factor of 3.40 μW cm-1 K-2 at 163 K, representing an improvement of about 187 % compared to undoped Ca3Co 4O9+δ. These results suggested that there is scope for improving the thermoelectric characteristics via partial substitution of Mn for Co.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalJournal of Electroceramics
Volume31
Issue number1-2
DOIs
Publication statusPublished - 2013 Oct 1

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Thermoelectric power
Electric conductivity
Substitution reactions
substitutes
solid state
electrical resistivity
synthesis
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

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title = "Thermoelectric properties of Ca3Co4-xMn xO9+δ with x = 0.00, 0.05, 0.10, and 0.15",
abstract = "Ca3Co4-xMnxO9+δ (x = 0.00, 0.05, 0.10, and 0.15) sample were prepared by conventional solid state synthesis. The thermoelectric properties were measured at 15 K-300 K. The XRD results revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers were holes over the entire temperature range. Both the electric resistivity and the thermopower increased with increasing Mn content. Ca3Co 3.95Mn0.05O9+δ had the highest power factor of 3.40 μW cm-1 K-2 at 163 K, representing an improvement of about 187 {\%} compared to undoped Ca3Co 4O9+δ. These results suggested that there is scope for improving the thermoelectric characteristics via partial substitution of Mn for Co.",
author = "Ankam Bhaskar and Chia-Jyi Liu and Huang, {Li Chen}",
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Thermoelectric properties of Ca3Co4-xMn xO9+δ with x = 0.00, 0.05, 0.10, and 0.15. / Bhaskar, Ankam; Liu, Chia-Jyi; Huang, Li Chen.

In: Journal of Electroceramics, Vol. 31, No. 1-2, 01.10.2013, p. 129-133.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermoelectric properties of Ca3Co4-xMn xO9+δ with x = 0.00, 0.05, 0.10, and 0.15

AU - Bhaskar, Ankam

AU - Liu, Chia-Jyi

AU - Huang, Li Chen

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AB - Ca3Co4-xMnxO9+δ (x = 0.00, 0.05, 0.10, and 0.15) sample were prepared by conventional solid state synthesis. The thermoelectric properties were measured at 15 K-300 K. The XRD results revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers were holes over the entire temperature range. Both the electric resistivity and the thermopower increased with increasing Mn content. Ca3Co 3.95Mn0.05O9+δ had the highest power factor of 3.40 μW cm-1 K-2 at 163 K, representing an improvement of about 187 % compared to undoped Ca3Co 4O9+δ. These results suggested that there is scope for improving the thermoelectric characteristics via partial substitution of Mn for Co.

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