Decrease of Ca3Co4O9+? thermal conductivity by Yb-doping

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dc.authoridSotelo, Andres/0000-0001-7056-0546
dc.authoridDiez, Juan C./0000-0001-9995-6368
dc.authoridRasekh, Shahed/0000-0003-3466-9952;
dc.authorwosidSotelo, Andres/A-6537-2009
dc.authorwosidDiez, Juan C./F-9177-2015
dc.authorwosidRasekh, Shahed/A-1248-2010
dc.authorwosidMadre, Maria A./F-9159-2015
dc.contributor.authorKIirat, G.
dc.contributor.authorAksan, M. A.
dc.contributor.authorRasekh, Sh.
dc.contributor.authorMadre, M. A.
dc.contributor.authorDiez, J. C.
dc.contributor.authorSotelo, A.
dc.date.accessioned2024-08-04T20:41:27Z
dc.date.available2024-08-04T20:41:27Z
dc.date.issued2015
dc.departmentİnönü Üniversitesien_US
dc.description.abstractIn this study, the effect of Yb-substitution on the structural, electrical and thermal transport properties of the Ca3Co4O9+delta system has been investigated in the low temperature region (between 10 and 300 K). The resistivity of samples increases with raising the Yb-concentration in the system. All the samples show a metal-semiconductor transition below 85 K. In the analysis based on Strongly Correlated Fermi Liquid Model, an increased bandwidth and a reduced electronic correlation are found. It has also been found that the energy gap, E-0, value also decreases with Yb-substitution. The samples show positive thermoelectric power, indicating that dominant charge carriers are holes in all the samples. The thermoelectric power value decreases with Yb-substitution. From Mott equation, it is determined that the Fermi energy and hole concentration decrease in the Yb-susbtituted samples, compared to the undoped ones. Thermal conductivity, kappa, is decreased in about 50% of the measured in undoped samples for the 0.01 and 0.03 Yb-doped samples at 300 K. Highest figure of merit, ZT, value is found to be 5.4 10(-3) at 300 K for the unsubstituted sample and the ZT value decreases by the substitution. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en_US
dc.description.sponsorshipMINECO-FEDER [MAT2013-46505-C3-1-R]; Gobierno de Aragon; Fondo Social Europeo (Research Groups T12); Fondo Social Europeo (Research Groups T87)en_US
dc.description.sponsorshipThe authors wish to thank the MINECO-FEDER (Project MAT2013-46505-C3-1-R) and the Gobierno de Aragon and Fondo Social Europeo (Research Groups T12 and T87) for financial support. The technical contributions of C. Estepa and C. Gallego are also acknowledged.en_US
dc.identifier.doi10.1016/j.ceramint.2015.04.156
dc.identifier.endpage12534en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue10en_US
dc.identifier.scopus2-s2.0-84955199280en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage12529en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2015.04.156
dc.identifier.urihttps://hdl.handle.net/11616/97133
dc.identifier.volume41en_US
dc.identifier.wosWOS:000362860900002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectThermal conductivityen_US
dc.subjectCeramicsen_US
dc.subjectDopingen_US
dc.subjectElectrical transporten_US
dc.titleDecrease of Ca3Co4O9+? thermal conductivity by Yb-dopingen_US
dc.typeArticleen_US

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