Synthesis and thermoelectric properties of Yb-doped Ca0.9-x Yb x La0.1MnO3 ceramics

Bo Zhang, Aimin Chang*, Qing Zhao, Haitao Ye, Yiquan Wu

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The microstructure and thermoelectric properties of Yb-doped Ca0.9-x Yb x La0.1 MnO3 (0 ≤ x ≤ 0.05) ceramics prepared by using the Pechini method derived powders have been investigated. X-ray diffraction analysis has shown that all samples exhibit single phase with orthorhombic perovskite structure. All ceramic samples possess high relative densities, ranging from 97.04% to 98.65%. The Seebeck coefficient is negative, indicating n-type conduction in all samples. The substitution of Yb for Ca leads to a marked decrease in the electrical resistivity, along with a moderate decrease in the absolute value of the Seebeck coefficient. The highest power factor is obtained for the sample with x = 0.05. The electrical conduction in these compounds is due to electrons hopping between Mn3+ and Mn4+, which is enhanced by increasing Yb content.

Original languageEnglish
Pages (from-to)4048-4055
Number of pages8
JournalJournal of Electronic Materials
Volume43
Issue number11
Early online date19 Aug 2014
DOIs
Publication statusPublished - 30 Nov 2014

Keywords

  • electrical conduction
  • manganites
  • Pechini method
  • power factor

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