Characterization of nanostructured bulk cobalt triantimonide doped with tellurium and indium prepared by pulsed plasma in liquid method

Rafał Zybała , M Schmidt , Kamil Kaszyca , M. Chmielewski , Mirosław Jakub Kruszewski , M. Jasiński , M. Rajska , Łukasz Ciupiński


One of the ways to decrease thermal conductivity is nano structurization. Cobalt triantimonide (CoSb3) samples with added indium or tellurium were prepared by the direct fusion technique from high purity elements. Ingots were pulverized and re-compacted to form electrodes. Then, the pulsed plasma in liquid (PPL) method was applied. All materials were consolidated using rapid spark plasma sintering (SPS). For the analysis, methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) with a laser flash apparatus (LFA) were used. For density measurement, the Archimedes' method was used. Electrical conductivity was measured using a standard four-wire method. The Seebeck coefficient was calculated to form measured Seebeck voltage in the sample placed in a temperature gradient. The preparation method allowed for obtaining CoSb3 nanomaterial with significantly lower thermal conductivity (10 Wm–1K–1 for pure CoSb3 and 3 Wm–1K–1 for the nanostructured sample in room temperature (RT)). The size of crystallites (from SEM observations) in the powders prepared was about 20 nm, joined into larger agglomerates. The Seebeck coefficient, $, was about –200 µVK–1 in the case of both dopants, In and Te, in microsized material and about –400 µVK–1 for the nanomaterial at RT. For pure CoSb3, $ was about 150 µVK–1 and it stood at –50 µVK–1 for nanomaterial at RT. In bulk nanomaterial samples, due to a decrease in electrical conductivity and inversion of the Seebeck coefficient, there was no increase in ZT values and the ZT for the nanosized material was below 0.02 in the measured temperature range, while for microsized In-doped sample it reached maximum ZT = 0.7 in (600K).
Author Rafał Zybała (FMSE / DMD)
Rafał Zybała,,
- Division of Materials Design
, M Schmidt - [Instytutu Technologii Materialow Elektronicznych w Warszawie]
M Schmidt,,
, Kamil Kaszyca - Institute of Electronic Materials Technology (ITME) [Instytutu Technologii Materialow Elektronicznych w Warszawie]
Kamil Kaszyca,,
, M. Chmielewski - [Instytutu Technologii Materialow Elektronicznych w Warszawie]
M. Chmielewski,,
, Mirosław Jakub Kruszewski (FMSE / DMD)
Mirosław Jakub Kruszewski,,
- Division of Materials Design
, M. Jasiński - [Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej]
M. Jasiński,,
, M. Rajska - [AGH University of Science and Technology (AGH)]
M. Rajska,,
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
, Łukasz Ciupiński (FMSE / DMD)
Łukasz Ciupiński,,
- Division of Materials Design
Journal seriesBulletin of the Polish Academy of Sciences, Technical Sciences, [Bulletin of the Polish Academy of Sciences: Technical Sciences], ISSN 0239-7528, e-ISSN 2300-1917
Issue year2020
NoNo. 1 February
Publication size in sheets0.5
Keywords in Englishenergy harvesting,nanostructured materials,skutterudite,spark plasma sintering,thermoelectric materials
ASJC Classification1702 Artificial Intelligence; 1705 Computer Networks and Communications; 1710 Information Systems; 2200 General Engineering; 3107 Atomic and Molecular Physics, and Optics
Languageen angielski
Zybała et al. - 2020 - Characterization of nanostructured bulk cobalt triantimonide doped with tellurium and indium prepared by puls.pdf 3.7 MB
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 29-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.293; WoS Impact Factor: 2018 = 1.277 (2) - 2018=1.256 (5)
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