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Phase relations and thermoelectric properties of alloys in the Bi2Te3-Bi2Se3 system

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Abstract

Using differential thermal analysis and x-ray diffraction, we have shown that the Bi2Te3-Bi2Se3 system contains a continuous series of solid solutions in a narrow temperature range and a compound of composition Bi2Te2Se below the solidus line. The liquidus and solidus lines determined using zone-melted samples differ little from those reported in the literature for equilibrium samples. The Bi2Te3−x Se x solid-solution phase extends to ∼-14 mol % Bi2Se3 (Bi2Te2.58Se0.42). The thermoelectric power of the alloys drops sharply near the boundary of the two-phase region. Within the homogeneity range of Bi2Te2Se (33.3 mol % Bi2Se3), the thermoelectric power factor has a minimum, while the thermoelectric power has a small maximum.

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Authors and Affiliations

  1. Nord Specialized Design & Technology Bureau, ul. Peschanyi kar’er 3, Moscow, 109383, Russia

    O. B. Sokolov, S. Ya. Skipidarov & N. I. Duvankov

  2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    G. G. Shabunina

Authors
  1. O. B. Sokolov
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  2. S. Ya. Skipidarov
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  3. N. I. Duvankov
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  4. G. G. Shabunina
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Original Russian Text © O.B. Sokolov, S.Ya. Skipidarov, N.I. Duvankov, G.G. Shabunina, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 1, pp. 10–13.

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Sokolov, O.B., Skipidarov, S.Y., Duvankov, N.I. et al. Phase relations and thermoelectric properties of alloys in the Bi2Te3-Bi2Se3 system. Inorg Mater 43, 8–11 (2007). https://doi.org/10.1134/S0020168507010037

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  • DOI: https://doi.org/10.1134/S0020168507010037

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