Enhanced thermoelectric efficiency of the bulk composites consisting of “Bi2Te3 matrix” and “filler Ni@NiTe2 inclusions”
Publication type: Journal Article
Publication date: 2021-03-01
scimago Q1
wos Q1
SJR: 1.829
CiteScore: 11.5
Impact factor: 5.6
ISSN: 13596462, 18728456
Metals and Alloys
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Mixture of thermoelectric Bi2Te3 and ferromagnetic Ni powders was spark-plasma-sintered to prepare bulk composites with different Ni content (0.5 and 1.25 at.%). Hexagonal Bi2Te3, cubic Ni and trigonal NiTe2 phases coexist in the composites. The Bi2Te3 phase forms matrix of the composite, whereas the Ni and NiTe2 phases corresponds to filler. The filler is formed by Ni@NiTe2 (“core-shell”) inclusions. Forming “core-shell” inclusions is due to high-temperature diffuse redistribution of Ni during the composites sintering. Gradient distributions of Ni, Te and Bi exist within these inclusions. Embedding the Ni filler into the Bi2Te3 matrix lead to drastic decrease of electrical resistivity, decrease of Seebeck coefficient, and increase of thermal conductivity. As result, the composites demonstrate enhanced thermoelectric efficiency. Optimal combination of thermoelectric properties for the composite with x = 0.5 at.% leads to more than two-fold enhancement of the thermoelectric figure-of-merit (∼0.67 for the composite against ∼0.30 for reference Bi2Te3 sample).
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Total citations:
11
Citations from 2024:
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(18%)
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Yaprintsev M. N. et al. Enhanced thermoelectric efficiency of the bulk composites consisting of “Bi2Te3 matrix” and “filler Ni@NiTe2 inclusions” // Scripta Materialia. 2021. Vol. 194. p. 113710.
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Yaprintsev M. N., Vasilev A., Ivanov O., Zhezhu M., Yaprintseva E., Novikov V. Enhanced thermoelectric efficiency of the bulk composites consisting of “Bi2Te3 matrix” and “filler Ni@NiTe2 inclusions” // Scripta Materialia. 2021. Vol. 194. p. 113710.
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TY - JOUR
DO - 10.1016/j.scriptamat.2020.113710
UR - https://doi.org/10.1016/j.scriptamat.2020.113710
TI - Enhanced thermoelectric efficiency of the bulk composites consisting of “Bi2Te3 matrix” and “filler Ni@NiTe2 inclusions”
T2 - Scripta Materialia
AU - Yaprintsev, Maksim N.
AU - Vasilev, Alexei
AU - Ivanov, Oleg
AU - Zhezhu, Marina
AU - Yaprintseva, Ekaterina
AU - Novikov, Vseslav
PY - 2021
DA - 2021/03/01
PB - Elsevier
SP - 113710
VL - 194
SN - 1359-6462
SN - 1872-8456
ER -
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@article{2021_Yaprintsev,
author = {Maksim N. Yaprintsev and Alexei Vasilev and Oleg Ivanov and Marina Zhezhu and Ekaterina Yaprintseva and Vseslav Novikov},
title = {Enhanced thermoelectric efficiency of the bulk composites consisting of “Bi2Te3 matrix” and “filler Ni@NiTe2 inclusions”},
journal = {Scripta Materialia},
year = {2021},
volume = {194},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016/j.scriptamat.2020.113710},
pages = {113710},
doi = {10.1016/j.scriptamat.2020.113710}
}