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Co-Cr-Fe-Mn-Ni Oxid...
Co-Cr-Fe-Mn-Ni Oxide as a Highly Efficient Thermoelectric High-Entropy Alloy
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- Pankratova, Daria (författare)
- Luleå tekniska universitet,Materialvetenskap,Lulea Univ Technol, Sweden
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- Giacomelli, Silvia Maria (författare)
- Department of Industrial Engineering, Università degli Studi di Padova, Via Giovanni Gradenigo, 6a, 35131 Padova PD, Italy,Univ Padua, Italy
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- Yusupov, Khabib (författare)
- Linköpings universitet,Materialdesign,Tekniska fakulteten
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- Akhtar, Farid (författare)
- Luleå tekniska universitet,Materialvetenskap,Lulea Univ Technol, Sweden
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- Vomiero, Alberto (författare)
- Luleå tekniska universitet,Materialvetenskap,Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy,Lulea Univ Technol, Sweden; Ca Foscari Univ Venice, Italy
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(creator_code:org_t)
- American Chemical Society, 2023
- 2023
- Engelska.
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Ingår i: ACS Omega. - : American Chemical Society. - 2470-1343. ; 8:16, s. 14484-14489
- Relaterad länk:
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https://doi.org/10.1...
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https://ltu.diva-por... (primary) (Raw object)
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Among the existing materials for heat conversion, high-entropy alloys are of great interest due to the tunability of their functional properties. Here, we aim to produce single-phase high-entropy oxides composed of Co-Cr-Fe-Mn-Ni-O through spark plasma sintering (SPS), testing their thermoelectric (TE) properties. This material was successfully obtained before via a different technique, which requires a very long processing time. Hence, the main target of this work is to apply spark plasma sintering, a much faster and scalable process. The samples were sintered in the temperature range of 1200–1300 °C. Two main phases were formed: rock salt-structured Fm3̅m and spinel-structured Fd3̅m. Comparable transport properties were achieved via the new approach: the highest value of the Seebeck coefficient reached −112.6 μV/K at room temperature, compared to −150 μV/K reported before; electrical properties at high temperatures are close to the properties of the single-phase material (σ = 0.2148 S/cm, σ ≈ 0.2009 S/cm reported before). These results indicate that SPS can be successfully applied to produce highly efficient TE high-entropy alloys in a fast and scalable way. Further optimization is needed for the production of single-phase materials, which are expected to exhibit an even better TE functionality.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Keramteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Ceramics (hsv//eng)
Nyckelord
- Experimentell fysik
- Experimental Physics
- Engineering Materials
- Materialteknik
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- ref (ämneskategori)
- art (ämneskategori)
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