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Effect of Bi-doping and Mg-excess on the thermoelectric properties of Mg2Si materials

dc.contributor.authorIoannou, M.en
dc.contributor.authorPolymeris, G. S.en
dc.contributor.authorHatzikraniotis, E.en
dc.contributor.authorParaskevopoulos, K. M.en
dc.contributor.authorKyratsi, Theodoraen
dc.creatorIoannou, M.en
dc.creatorPolymeris, G. S.en
dc.creatorHatzikraniotis, E.en
dc.creatorParaskevopoulos, K. M.en
dc.creatorKyratsi, Theodoraen
dc.date.accessioned2019-05-06T12:23:44Z
dc.date.available2019-05-06T12:23:44Z
dc.date.issued2014
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/48428
dc.description.abstractIn this work, Bi-doped magnesium silicide compounds were prepared by applying a combination of both, short-time ball milling and heating treatment. The effect of Mg excess was also studied, aiming towards further improvement in thermoelectric properties. The structural modifications of all materials were followed by Powder X-ray diffraction and Scanning Electron Microscopy. Highly dense pellets of Mg2Si1-xBix (0≤x≤0.035) and Mg2+δSi0.975Bi0.025 (δ=0.04, 0.06 and 0.12) were fabricated via hot pressing and studied in terms of Seebeck coefficient, electrical and thermal conductivities and free carrier concentration. Their thermoelectric performance, at high temperature range, is presented and the maximum value of the dimensionless-figure-of-merit (ZT) is found to be 0.68 at 810 K, for Mg2Si0.97Bi0.03. © 2014 Elsevier Ltd. All rights reserved.en
dc.language.isoengen
dc.sourceJournal of Physics and Chemistry of Solidsen
dc.subjectThermal conductivityen
dc.subjectThermoelectricityen
dc.subjectX ray diffractionen
dc.subjectBall millingen
dc.subjectSiliconen
dc.subjectScanning electron microscopyen
dc.subjectBismuth compoundsen
dc.subjectThermoelectric propertiesen
dc.subjectThermoelectric equipmenten
dc.subjectMagnesium silicidesen
dc.subjectPowder X ray diffractionen
dc.subjectSilicidesen
dc.subjectFree carrier concentrationen
dc.subjectHigh temperature rangeen
dc.subjectHot pressingen
dc.subjectStructural modificationsen
dc.subjectThermoelectric performanceen
dc.subjectA. Intermetallic compoundsen
dc.subjectD. Thermal conductivityen
dc.subjectD. Transport propertiesen
dc.subjectHeating treatmentsen
dc.titleEffect of Bi-doping and Mg-excess on the thermoelectric properties of Mg2Si materialsen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1016/j.jpcs.2014.04.008
dc.description.volume75
dc.description.startingpage984
dc.description.endingpage991
dc.author.facultyΠολυτεχνική Σχολή / Faculty of Engineering
dc.author.departmentΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.type.uhtypeArticleen
dc.contributor.orcidKyratsi, Theodora [0000-0003-2916-1708]
dc.description.totalnumpages984-991
dc.gnosis.orcid0000-0003-2916-1708


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