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Title | Bismuth Doping in Nanostructured Tetrahedrite: Scalable Synthesis and Thermoelectric Performance |
Authors |
Balaz, P.
Guilmeau, E. Achimovicova, M. Balaz, M. Daneu, N. Dobrozhan, Oleksandr Anatoliiovych ![]() Kanuchova, M. |
ORCID |
http://orcid.org/0000-0001-9238-7596 |
Keywords |
tetrahedrite doping bismuth high-energy milling thermoelectricity |
Type | Article |
Date of Issue | 2021 |
URI | https://essuir.sumdu.edu.ua/handle/123456789/84730 |
Publisher | MDPI |
License | Creative Commons Attribution 4.0 International License |
Citation | Baláž P, Guilmeau E, Achimovičová M, Baláž M, Daneu N, Dobrozhan O, Kaňuchová M. Bismuth Doping in Nanostructured Tetrahedrite: Scalable Synthesis and Thermoelectric Performance. Nanomaterials. 2021; 11(6):1386. https://doi.org/10.3390/nano11061386 |
Abstract |
In this study, we demonstrate the feasibility of Bi-doped tetrahedrite Cu12Sb4−xBixS13
(x = 0.02–0.20) synthesis in an industrial eccentric vibratory mill using Cu, Sb, Bi and S elemental
precursors. High-energy milling was followed by spark plasma sintering. In all the samples, the
prevailing content of tetrahedrite Cu12Sb4S13 (71–87%) and famatinite Cu3SbS4
(13–21%), together with small amounts of skinnerite Cu3SbS3, have been detected. The occurrence of the individual Cu-Sb-S phases and oxidation states of bismuth identified as Bi0 and Bi3+ are correlated. The most
prominent effect of the simultaneous milling and doping on the thermoelectric properties is a decrease
in the total thermal conductivity (κ) with increasing Bi content, in relation with the increasing amount
of famatinite and skinnerite contents. The lowest value of κ was achieved for x = 0.2 (1.1 W m−1 K
−1 at 675 K). However, this sample also manifests the lowest electrical conductivity σ, combined with
relatively unchanged values for the Seebeck coefficient (S) compared with the un-doped sample.
Overall, the lowered electrical performances outweigh the benefits from the decrease in thermal
conductivity and the resulting figure-of-merit values illustrate a degradation effect of Bi doping on
the thermoelectric properties of tetrahedrite in these synthesis conditions. |
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File | Size | Format | Downloads |
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Baláž_et.al_Bismuth_Doping_nanomaterials_2021.pdf | 3.63 MB | Adobe PDF | 281465328 |
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