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An enhanced thermoelectric figure of merit for Sr(Ti0.8Nb0.2)O3 based on a Ruddlesden–Popper-polytype-induced microstructure

Jerič, Marja and de Boor, Johannes and Jančar, Boštjan and Čeh, Miran (2016) An enhanced thermoelectric figure of merit for Sr(Ti0.8Nb0.2)O3 based on a Ruddlesden–Popper-polytype-induced microstructure. Journal of the European Ceramic Society, 36 (5), pp. 1177-1182. Elsevier. ISSN 0955-2219

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2015.12.001

Abstract

Platelet crystals based on Ruddlesden–Popper (RP) polytypes prepared by molten-salt synthesis wereused to influence the microstructural development of Nb-doped SrTiO3(STO;Nb) perovskite and,consequently, to change the thermoelectric properties. Electron microscopy revealed intergrowth ofRP-polytypic phases within the STO;Nb solid-solution matrix phase. The morphology of the grains variedfrom isotropic to anisotropic, containing polytypic faults up to 100 �m in length. Such a microstructureincreased the thermoelectric figure of merit by 50% at 650◦C, due to substantially enhanced electricalconductivity, slightly increased Seebeck coefficient and lowered thermal conductivity.

Item URL in elib:https://elib.dlr.de/108670/
Document Type:Article
Title:An enhanced thermoelectric figure of merit for Sr(Ti0.8Nb0.2)O3 based on a Ruddlesden–Popper-polytype-induced microstructure
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jerič, MarjaJožef Stefan Institute, Ljubljana, Slovenia and Jožef Stefan International Postgraduate School, Ljubljana, SloveniaUNSPECIFIED
de Boor, JohannesGerman aerospace center, Institute of materials research, Köln, GermanyUNSPECIFIED
Jančar, BoštjanJožef Stefan Institute, Ljubljana, SloveniaUNSPECIFIED
Čeh, MiranJožef Stefan Institute, Ljubljana, SloveniaUNSPECIFIED
Date:20 April 2016
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:36
Page Range:pp. 1177-1182
Publisher:Elsevier
ISSN:0955-2219
Status:Published
Keywords:Thermoelectric materials, Nb-doped SrTiO3, Ruddlesden–Popper polytypes, Seed crystals, Molten-salt synthesis
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (Storage) (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:01 Dec 2016 09:52
Last Modified:10 Jan 2019 15:49

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