The effect of synthesis technique on thermoelectric properties of nanocrystalline NaCo2O4 ceramics

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dc.contributor.authorErdal, Mehmet Okan
dc.contributor.authorKoyuncu, Mustafa
dc.contributor.authorUslu, Ibrahim
dc.date.accessioned2020-03-26T18:58:36Z
dc.date.available2020-03-26T18:58:36Z
dc.date.issued2014
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractSodium cobalt oxide (NaCo2O4) nanocrystalline thermoelectric ceramic powders were synthesized using conventional polymerized complex sol-gel and electrospinning techniques and then consolidated into bulk ceramics. We have investigated the differences in the microstructure and thermoelectric properties of the samples prepared using electrospinning and sol-gel methods. The crystal structures of the powders and nanofibers were characterized using X-ray diffraction and scanning electron microscopy before and after calcination at different temperatures. Nanofibers prepared by electrospinning have a diameter of approximately 300 nm, while the diameter of the grains of sol-gel powders ranges from 1 to 5 mu m. Thermoelectric properties of the bulk ceramics were measured by physical properties measurement system in the temperature range of 15-300 K. The calculated values of dimensionless figure of merit at 300 K are 6 x 10(-7) and 4 x 10(-5) for sintered powders from sol-gel and nanofibers, respectively. While electrospinning production technique increase thermoelectric power approximately 15 % and it fold electrical conductivity average 20 times, it decreased thermal conductivity by 90 %.en_US
dc.description.sponsorshipScientific Research Project Coordination Unit of Selcuk UniversitySelcuk Universityen_US
dc.description.sponsorshipThis study was supported by Scientific Research Project Coordination Unit of Selcuk University.en_US
dc.identifier.doi10.1007/s11051-014-2715-5en_US
dc.identifier.issn1388-0764en_US
dc.identifier.issn1572-896Xen_US
dc.identifier.issue11en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s11051-014-2715-5
dc.identifier.urihttps://hdl.handle.net/20.500.12395/31193
dc.identifier.volume16en_US
dc.identifier.wosWOS:000346696900051en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofJOURNAL OF NANOPARTICLE RESEARCHen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectThermoelectric propertiesen_US
dc.subjectSodium cobaltineen_US
dc.subjectNanocompositeen_US
dc.subjectElectrospinningen_US
dc.subjectSol-gelen_US
dc.subjectEnergy conversionen_US
dc.titleThe effect of synthesis technique on thermoelectric properties of nanocrystalline NaCo2O4 ceramicsen_US
dc.typeArticleen_US

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