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Thermoelectric Properties of Silver Antimonate with Mixed Valency of Antimony
Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan
Clean Energy Research Center, University of Yamanashi, Yamanashi, Japan
Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan
- 1 Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan
- 2 Clean Energy Research Center, University of Yamanashi, Yamanashi, Japan
- 3 Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan
Journal of Materials Science and Chemical Engineering·Volume 05 (2017)·Pages 121–128·Published 4 January 2017·DOI10.4236/msce.2017.51016
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Abstract
Silver (Ag) and silver antimonate (AgSbO 3 ) composites with different amounts of Sb 3+ were synthesized by normal sintering with the aim of realizing a thermoelectric material. The electrical conductivity ( σ ) increased in the sample containing larger amount of Sb 3+ , whereas Seebeck coefficient ( S ) decreased. Producing Sb 3+ caused the generation of oxygen vacancies in the material, and thus the corresponding donor levels are created in the bandgap, providing more conduction electrons. The conductive Ag particles would contribute to the conduction path as bypasses for carrier transport. The thermal conductivity ( κ ) was slightly lower in the presence of Ag defects in AgSbO 3 .
KeywordsThermoelectric MaterialSilver AntimonateSeebeck CoefficientElectrical ConductivityThermal Conductivity
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