Thermoelectric Properties of Sb2Te3-Based Nanocomposites with Graphite
- Authors: Kulbachinskii V.A.1, Kytin V.G.1, Zinoviev D.A.1, Maslov N.V.1, Singha P.2, Das S.2, Banerjee A.2
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Affiliations:
- Faculty of Physics, Moscow State University
- Department of Physics, University of Calcutta
- Issue: Vol 53, No 5 (2019)
- Pages: 638-640
- 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/206082
- DOI: https://doi.org/10.1134/S1063782619050129
- ID: 206082
Cite item
Abstract
Antimony-telluride-based nanocomposite samples containing different weight fractions of graphite (Sb2Te3 + x% graphite, where x = 0.0, 0.5, 1.0, and 2.5%) are synthesized and studied. The samples are produced by a solid-state reaction with the use of a ball mill. X-ray diffraction measurements show that the Sb2Te3 phase is present in the nanocomposites. All of the diffraction peaks are identified as corresponding to the rhombohedral structure of symmetry \(R\bar {3}m\). No additional peaks related to graphite are observed because of its low content. Moreover, the X-ray data show the insolubility of graphite in Sb2Te3: the peaks related to Sb2Te3 remain unchanged upon the addition of graphite. The thermal conductivity, thermoelectric power, and resistivity of the samples are studied in the temperature range 80 K ≤ T ≤ 320 K. The thermal conductivity k of the nanocomposite decreases several times compared to the thermal conductivity of single-crystal Sb2Te3 and reaches k ≈ 0.95 W m–1 K–1 at x = 0.5%. The parameter k unsteadily depends on the content of graphite. The thermoelectric power of the nanocomposites with graphite at x = 1.0% is higher compared to that of nanostructured Sb2Te3.
About the authors
V. A. Kulbachinskii
Faculty of Physics, Moscow State University
Author for correspondence.
Email: kulb@mig.phys.msu.ru
Russian Federation, Moscow, 119991
V. G. Kytin
Faculty of Physics, Moscow State University
Email: kulb@mig.phys.msu.ru
Russian Federation, Moscow, 119991
D. A. Zinoviev
Faculty of Physics, Moscow State University
Email: kulb@mig.phys.msu.ru
Russian Federation, Moscow, 119991
N. V. Maslov
Faculty of Physics, Moscow State University
Email: kulb@mig.phys.msu.ru
Russian Federation, Moscow, 119991
P. Singha
Department of Physics, University of Calcutta
Email: kulb@mig.phys.msu.ru
India, Kolkata, 700009
S. Das
Department of Physics, University of Calcutta
Email: kulb@mig.phys.msu.ru
India, Kolkata, 700009
A. Banerjee
Department of Physics, University of Calcutta
Email: kulb@mig.phys.msu.ru
India, Kolkata, 700009