Structure, Homogeneity and Properties of Thermoelectric Materials Based on Ternary Solid Solutions of Bismuth and Antimony Chalcogenides |
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| Authors: | V.B. Ufimtsev V.B. Osvensky V.T. Bublik T.B. Sagalova O.E. Jouravlev |
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| Affiliation: | (1) Institute of Chemical Problems of Microelectronics, B. Tolmachevskij per. 5, Moscow, 109017, Russia;(2) Institute of Steel and Alloys, Leninsky Prosp. 6, Moscow, 117936, Russia;(3) Atramet Inc., 222 Sherwood Ave., Farmingdale, NY 11735, USA |
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| Abstract: | Ternary solid solutions BixSb1-xTe and especially Bi2Te1-ySey grown by vertical zone melting have the tendency for dendrite liquation. It causes considerable chemical inhomogeneity of the material and multicomponent structure. The effect of long-term annealing at 380–400°C on microstructure, phase composition and properties of structural components has been studied. It was shown that proper growth regime provides ingots with oriented column structure and good texture, which maximizes thermoelectric properties along the growth axis. |
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| Keywords: | thermoelectric material Bismuth Telluride dendrite structure solid solution homogenization anisotropy lattice parameter homogeneity |
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