Resistivity and Thermal Expansion (4.2-820 K) of Skutterudites after Severe Plastic Deformation via HPT
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F20%3A00531633" target="_blank" >RIV/68081723:_____/20:00531633 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.202000040" target="_blank" >https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.202000040</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/zaac.202000040" target="_blank" >10.1002/zaac.202000040</a>
Alternative languages
Result language
angličtina
Original language name
Resistivity and Thermal Expansion (4.2-820 K) of Skutterudites after Severe Plastic Deformation via HPT
Original language description
Thermoelectric materials with a high figure of merit, ZT, are the essential basis to build thermoelectric generators, which can directly convert heat into electricity. Severe plastic deformation (SPD) via high-pressure torsion (HPT) was successfully applied to enhance ZT of ball-milled and hot-pressed skutterudites as well as to produce bulk nanostructured skutterudites directly from powders. SPD introduces many defects into the sample and in parallel the crystallite size is significantly reduced. During measurement-induced heating these defects anneal partially out, and the grains grow. In this work for the first time systematically the changes of the temperature-dependent electrical resistivity and of thermal expansion were compared. It could be shown that for p- and n-type skutterudites, being hot-pressed and HPT-processed as well as directly HPT-processed from compacted powder, these changes occur more or less simultaneously within the same temperature ranges. This evaluation gives a much deeper insight into the thermoelectric behavior of HPT samples under the influence of changing temperature.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Zeitschrift für anorganische und allgemeine Chemie
ISSN
0044-2313
e-ISSN
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Volume of the periodical
646
Issue of the periodical within the volume
14
Country of publishing house
DE - GERMANY
Number of pages
6
Pages from-to
1267-1272
UT code for WoS article
000548657800001
EID of the result in the Scopus database
2-s2.0-85088022570