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Journal of Electroceramics

, Volume 31, Issue 1–2, pp 124–128 | Cite as

Thermoelectric properties of n-type Ca1-xBixMnO3-δ (0.00, 0.02, and 0.05) system

  • Ankam Bhaskar
  • J. J. Yuan
  • Chia-Jyi Liu
Article

Abstract

Polycrystalline samples of Ca1-xBixMnyO3-δ (x = 0.00, 0.02, and 0.05) are prepared by the conventional solid-state reactions. Thermoelectric properties are measured at 300 K–700 K. All the samples are single phase with an orthorhombic structure. Thermopower of all the samples is negative, indicating that predominant carriers are electrons over the entire temperature range. Among the samples, Ca2.95Bi0.05MnO3-δ has the highest dimensionless figure of merit of 0.047 at 300 K, representing an improvement of about 487 % with respect to the parent compound of CaMnO3-δ.

Keywords

Thermoelectric materials Oxygen defect Electrical resistivity Thermopower Thermal conductivity 

Notes

Acknowledgments

This work was supported by National Science Council (NSC) of Republic of China, Taiwan under the Grant No. 101-2112-M-018-003-MY3. Ankam Bhaskar would like to express thanks to the postdoctoral fellowship sponsored NSC of Taiwan.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of PhysicsNational Changhua University of EducationChanghuaTaiwan

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