High-Temperature Thermoelectric Properties of Sol-Gel Processed Ca2.5Ag0.3RE0.2Co4O9 (RE: Y and Rare-Earths) Materials

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dc.contributor.authorKilinc, Enes
dc.contributor.authorUysal, Fatih
dc.contributor.authorCelik, Erdal
dc.contributor.authorKurt, Huseyin
dc.date.accessioned2024-02-23T13:03:32Z
dc.date.available2024-02-23T13:03:32Z
dc.date.issued2020
dc.departmentNEÜen_US
dc.description.abstractHerein, dually doped Ca2.5Ag0.3RE0.2Co4O9 (RE: La, Pr, Nd, Sm, Gd, Dy, Er, Yb, Eu, Tb, Ho, Lu, Ce, and Y) samples are synthesized by sol-gel technique and consolidated by cold pressing under high pressure to systematically scrutinize the influences of Y and rare-earth dually doping with Ag on transport properties of Ca3Co4O9 for high-temperature thermoelectric (TE) applications. Characterization results reveal that targeted phase is successfully produced, and doping of the compositions is provided. Doping of Y and rare-earth elements together with Ag into the Ca2+ site is effective in increasing the Seebeck coefficient and decreasing the electrical resistivity of the samples, thanks to the reduction in carrier concentration. Thermal conductivity of the samples is reduced related to the lower relative densities and alloy scattering originated from dually doping. Among the samples, Ca2.5Ag0.3Ho0.2Co4O9 and Ca2.5Ag0.3Eu0.2Co4O9 exhibit the highest power factor (PF) values of 0.65 and 0.62 mW m(-1) K-2 at 800 degrees C, respectively. These results are quite high for bulk oxide TE materials which can be assessed as potential oxide TE materials for high-temperature TE power generation.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [115M579]en_US
dc.description.sponsorshipThis work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) [grant no. 115M579].en_US
dc.identifier.doi10.1002/pssa.202000056
dc.identifier.issn1862-6300
dc.identifier.issn1862-6319
dc.identifier.issue15en_US
dc.identifier.scopus2-s2.0-85085583157en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1002/pssa.202000056
dc.identifier.urihttps://hdl.handle.net/20.500.12452/10659
dc.identifier.volume217en_US
dc.identifier.wosWOS:000535583400001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWiley-V C H Verlag Gmbhen_US
dc.relation.ispartofPhysica Status Solidi A-Applications And Materials Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDually Dopingen_US
dc.subjectFigures Of Meriten_US
dc.subjectOxide Thermoelectricsen_US
dc.subjectSol-Gelen_US
dc.subjectThermoelectric Propertiesen_US
dc.titleHigh-Temperature Thermoelectric Properties of Sol-Gel Processed Ca2.5Ag0.3RE0.2Co4O9 (RE: Y and Rare-Earths) Materialsen_US
dc.typeArticleen_US

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