Influence of the Sintering Temperature on the Thermoelectric Properties of the Bi1.9Gd0.1Te3 Compound
- Authors: Yapryntsev M.N.1, Vasiliev A.E.1, Ivanov O.N.1,2
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Affiliations:
- Belgorod National Research University
- Belgorod State Technological University named after V.G. Shukhov
- Issue: Vol 53, No 5 (2019)
- Pages: 615-619
- Section: XVI International Conference “thermoelectrics and Their Applications–2018” (Iscta 2018,) St. Petersburg, October 8–12, 2018
- URL: https://journals.rcsi.science/1063-7826/article/view/206048
- DOI: https://doi.org/10.1134/S1063782619050300
- ID: 206048
Cite item
Abstract
The regularities of the influence of the sintering temperature (750, 780, 810, and 840 K) on the elemental composition, crystal-lattice parameters, electrical resistivity, Seebeck coefficient, total thermal conductivity, and thermoelectric figure of merit of the Bi1.9Gd0.1Te3 compound are investigated. It is established that the elemental composition of the samples during high-temperature sintering varies due to intense tellurium evaporation, which can lead to the formation of various point defects (vacancies and antisite defects) affecting the majority carrier (electron) concentration and mobility. The sintering temperature greatly affects the electrical resistivity of the samples, while the influence on the Seebeck coefficient and total thermal conductivity is much weaker. The largest thermoelectric figure of merit (ZT ≈ 0.55) is observed for the sample sintered at 750 K.
About the authors
M. N. Yapryntsev
Belgorod National Research University
Author for correspondence.
Email: yaprinstev@bsu.edu.ru
Russian Federation, Belgorod, 308015
A. E. Vasiliev
Belgorod National Research University
Email: yaprinstev@bsu.edu.ru
Russian Federation, Belgorod, 308015
O. N. Ivanov
Belgorod National Research University; Belgorod State Technological University named after V.G. Shukhov
Email: yaprinstev@bsu.edu.ru
Russian Federation, Belgorod, 308015; Belgorod, 308012