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Jerič, Marja und de Boor, Johannes und Zavašnik, Janez und Čeh, Miran (2016) Lowering the thermal conductivity of Sr(Ti0.8Nb0.2)O3 by SrO and CaO doping: microstructure and thermoelectric properties. Journal of Materials Science, 51 (16), Seiten 7660-7668. Springer. doi: 10.1007/s10853-016-0048-8. ISSN 0022-2461.
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Offizielle URL: https://doi.org/10.1007/s10853-016-0048-8
Kurzfassung
Excess SrO and CaO were added to the Sr(Ti0.8Nb0.2)O3 thermoelectric material, which was structurally compensated by the formation of Ruddlesden–Popper-type planar faults with the compositions SrO and/or (Sr, Ca)O. Both types of doping significantly changed the original isotropic Sr(Ti0.8Nb0.2)O3 microstructure and resulted in the formation of lamellar Ruddlesden–Popper-type phases within the Sr(Ti0.8Nb0.2)O3 grains. Three-dimensional networks of single Ruddlesden–Popper-type faults were also observed in the Sr(Ti0.8Nb0.2)O3 for both types of doping. The combination of both structural features significantly lowered the thermal conductivity in comparison with Sr(Ti0.8Nb0.2)O3 due to the enhanced phonon scattering observed at the planar faults, which proves that introducing such defects is a promising method for lowering the thermal conductivity of the Sr(Ti0.8Nb0.2)O3 thermoelectric material. The highest figure of merit (ZT = 0.08) was achieved with CaO doping, since the significantly reduced thermal conductivity was accompanied by an increased power factor.
| elib-URL des Eintrags: | https://elib.dlr.de/108681/ | ||||||||||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
| Titel: | Lowering the thermal conductivity of Sr(Ti0.8Nb0.2)O3 by SrO and CaO doping: microstructure and thermoelectric properties | ||||||||||||||||||||
| Autoren: |
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| Datum: | 20 Mai 2016 | ||||||||||||||||||||
| Erschienen in: | Journal of Materials Science | ||||||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||
| In SCOPUS: | Ja | ||||||||||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||||||||||
| Band: | 51 | ||||||||||||||||||||
| DOI: | 10.1007/s10853-016-0048-8 | ||||||||||||||||||||
| Seitenbereich: | Seiten 7660-7668 | ||||||||||||||||||||
| Verlag: | Springer | ||||||||||||||||||||
| ISSN: | 0022-2461 | ||||||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||||||
| Stichwörter: | Thermoelectric materials, microstructure, Sr(Ti0.8Nb0.2)O3 | ||||||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
| HGF - Programm: | Verkehr | ||||||||||||||||||||
| HGF - Programmthema: | Bodengebundener Verkehr (alt) | ||||||||||||||||||||
| DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||
| DLR - Forschungsgebiet: | V BF - Bodengebundene Fahrzeuge | ||||||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | V - NGC-Antriebsstrang (alt) | ||||||||||||||||||||
| Standort: | Köln-Porz | ||||||||||||||||||||
| Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Thermoelektrische Materialien und Systeme | ||||||||||||||||||||
| Hinterlegt von: | Yasseri, Mohammad | ||||||||||||||||||||
| Hinterlegt am: | 01 Dez 2016 09:59 | ||||||||||||||||||||
| Letzte Änderung: | 13 Jun 2023 13:52 |
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