In order to create a sufficiently strong material with thermo- and magneto-thermoelectric figure of merit, close to that for single-crystal samples, extruded samples of Bi0.85Sb0.15 solid solution were obtained on the basis of Bi-Sb systems. The effect of composition, heat treatment mode, grain size, and tellurium impurities on their thermoelectric properties was investigated in the temperature range ~77–300 K and at magnetic field strength H up to ~74·104 A/m. We managed to obtain extruded material with thermo- and magneto-thermoelectric quality factors ~6.2·10–3 K–1 and ~7.2·10–3K–1 at ~77 K, respectively, with strengths ~3 times higher than the strength of single-crystal samples of this composition, which are suitable for use in low-temperature thermoelectric converters.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 11–16, September, 2021.
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Tagiyev, M.M., Abdinova, G.D. & Barkhalov, B.S. Extruded Material Based on Bi0.85Sb0.15 for Thermoelectric Converters. Russ Phys J 64, 1592–1598 (2022). https://doi.org/10.1007/s11182-022-02496-6
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DOI: https://doi.org/10.1007/s11182-022-02496-6