Crystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12

Handle URI:
http://hdl.handle.net/10754/597904
Title:
Crystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12
Authors:
Dong, Yongkwan; Puneet, Pooja; Tritt, Terry M.; Nolas, George S.
Abstract:
Partially Yb-filled Fe substituted polycrystalline p-type skutterudites with nominal compositions YbxCo2.5Fe1.5Sb 12, with varying filler concentrations x, were synthesized by reacting the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The compositions and filling fractions were confirmed with a combination of Rietveld refinement and elemental analysis. Their thermoelectric properties were evaluated from 300 to 800 K. The Seebeck coefficients for the specimens increase with increasing temperature and plateau at around 750 K. The thermal conductivity decreases with increasing Yb filling fraction, and bipolar conduction becomes evident and increases at elevated temperatures. A maximum ZT value of 0.8 was obtained at 750 K for Yb 0.47Co2.6Fe1.4Sb12. The thermoelectric properties and potential for further optimization are discussed in light of our results. © 2013 Elsevier Inc.
Citation:
Dong Y, Puneet P, Tritt TM, Nolas GS (2014) Crystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12. Journal of Solid State Chemistry 209: 1–5. Available: http://dx.doi.org/10.1016/j.jssc.2013.10.009.
Publisher:
Elsevier BV
Journal:
Journal of Solid State Chemistry
Issue Date:
Jan-2014
DOI:
10.1016/j.jssc.2013.10.009
Type:
Article
ISSN:
0022-4596
Sponsors:
Y.D. and G.S.N. gratefully acknowledge financial support from the National Science Foundation and Department of Energy Partnership on Thermoelectric Devices for Vehicle Applications (Grant No. 1048796). The work in Dr. Tritt's lab acknowledges in part the support of a KAUST Faculty Initiated Collaboration grant and also some funding from Clemson University.
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Full metadata record

DC FieldValue Language
dc.contributor.authorDong, Yongkwanen
dc.contributor.authorPuneet, Poojaen
dc.contributor.authorTritt, Terry M.en
dc.contributor.authorNolas, George S.en
dc.date.accessioned2016-02-25T12:58:38Zen
dc.date.available2016-02-25T12:58:38Zen
dc.date.issued2014-01en
dc.identifier.citationDong Y, Puneet P, Tritt TM, Nolas GS (2014) Crystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12. Journal of Solid State Chemistry 209: 1–5. Available: http://dx.doi.org/10.1016/j.jssc.2013.10.009.en
dc.identifier.issn0022-4596en
dc.identifier.doi10.1016/j.jssc.2013.10.009en
dc.identifier.urihttp://hdl.handle.net/10754/597904en
dc.description.abstractPartially Yb-filled Fe substituted polycrystalline p-type skutterudites with nominal compositions YbxCo2.5Fe1.5Sb 12, with varying filler concentrations x, were synthesized by reacting the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The compositions and filling fractions were confirmed with a combination of Rietveld refinement and elemental analysis. Their thermoelectric properties were evaluated from 300 to 800 K. The Seebeck coefficients for the specimens increase with increasing temperature and plateau at around 750 K. The thermal conductivity decreases with increasing Yb filling fraction, and bipolar conduction becomes evident and increases at elevated temperatures. A maximum ZT value of 0.8 was obtained at 750 K for Yb 0.47Co2.6Fe1.4Sb12. The thermoelectric properties and potential for further optimization are discussed in light of our results. © 2013 Elsevier Inc.en
dc.description.sponsorshipY.D. and G.S.N. gratefully acknowledge financial support from the National Science Foundation and Department of Energy Partnership on Thermoelectric Devices for Vehicle Applications (Grant No. 1048796). The work in Dr. Tritt's lab acknowledges in part the support of a KAUST Faculty Initiated Collaboration grant and also some funding from Clemson University.en
dc.publisherElsevier BVen
dc.subjectSkutteruditesen
dc.subjectSolid state reactionsen
dc.subjectThermoelectricsen
dc.titleCrystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12en
dc.typeArticleen
dc.identifier.journalJournal of Solid State Chemistryen
dc.contributor.institutionUniversity of South Florida Tampa, Tampa, United Statesen
dc.contributor.institutionClemson University, Clemson, United Statesen
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