Microstructure and Thermoelectric Properties of Medium-Entropy BiSbTe.sub.1.5Se.sub.1.5 and PbSnTeSe Compounds Prepared by Reactive Spark Plasma Sintering

Reactive spark plasma sintering (RSPS) is used to obtain single-phase samples of medium-entropy BiSbTe.sub.1.5Se.sub.1.5 compounds (low-temperature thermoelectric electronic type of conductivity) and PbSnTeSe (medium temperature hole-type thermoelectric conductor) from a mixture of powders of the co...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2022-01, Vol.56 (1), p.25
Main Authors: Yapryntseva, E. N, Ivanov, O. N, Vasil'ev, A. E, Yapryntsev, M. N
Format: Article
Language:English
Subjects:
Sintering
Thermoelectricity
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Summary:Reactive spark plasma sintering (RSPS) is used to obtain single-phase samples of medium-entropy BiSbTe.sub.1.5Se.sub.1.5 compounds (low-temperature thermoelectric electronic type of conductivity) and PbSnTeSe (medium temperature hole-type thermoelectric conductor) from a mixture of powders of the corresponding elemental metals. The obtained samples are polycrystalline with lamellar grains with the average size of ~3.3 [micro]m in BiSbTe.sub.1.5Se.sub.1.5 and with irregularly shaped grains with the average size of ~18.9 [mu]m in PbSnTeSe. The maximum thermoelectric figure-of-merit of the samples is ~0.43 (at 500 K for BiSbTe.sub.1.5Se.sub.1.5) and ~0.35 (at 725 K for PbSnTeSe).
ISSN:1063-7826
DOI:10.1134/S106378262202018X