Microstructure and Thermoelectric Properties of Medium-Entropy BiSbTe1.5Se1.5 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 1.5 Se 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 correspon...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2022, Vol.56 (1), p.25-28
Main Authors: Yapryntseva, E. N., Ivanov, O. N., Vasil’ev, A. E., Yapryntsev, M. N.
Format: Article
Language:English
Subjects:
Conductors
Entropy
Grains
Low temperature
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Plasma sintering
Sintering (powder metallurgy)
Spark plasma sintering
Thermoelectricity
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Summary:Reactive spark plasma sintering (RSPS) is used to obtain single-phase samples of medium-entropy BiSbTe 1.5 Se 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 µm in BiSbTe 1.5 Se 1.5 and with irregularly shaped grains with the average size of ~18.9 μm in PbSnTeSe. The maximum thermoelectric figure-of-merit of the samples is ~0.43 (at 500 K for BiSbTe 1.5 Se 1.5 ) and ~0.35 (at 725 K for PbSnTeSe).
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378262202018X