2015•Izvestiya Vysshikh Uchebnykh Zavedenii Materialy Elektronnoi Tekhniki = Materials of Electronics EngineeringOpen access

Thermoelectric Properties of Spark Plasma Sintering Synthesized (Bi,Sb)2Te3 Based Bulk Thermoelectric Materia

I. A. Drabkin, V. V. Karataev, V. B. Osvensky, Yu. N. Parkhomenko, A. I. Sorokin, L. P. Bulat, G. I. Pivovarov, В. Т. Бублик, N. Yu. Tabachkova

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Abstract

Thermoelectric properties of (Bi,Sb)2Te3 nanostructured bulk material as a function of composition and spark plasma sintering temperature were investigated. The Bi0,4Sb1,6Te3 alloys at sintering temperature 450—500 °C with ZT=1,25—1,28 figure of merit was fabricated. Thermoelectric properties ad a function of sintering temperature above 400 °C correlate with fine structure change. It was found that point structure defects introduce essential contribution to the formation of nanostructured material thermoelectric properties.

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Key concepts: Spark plasma sintering, Thermoelectric effect, Materials science, Sintering, Thermoelectric materials, Metallurgy, Figure of merit, Composite material