Synthesis–property relationship in thermoelectric Sr 1− x Yb x TiO 3− δ ceramics

Handle URI:
http://hdl.handle.net/10754/575607
Title:
Synthesis–property relationship in thermoelectric Sr 1− x Yb x TiO 3− δ ceramics
Authors:
Bhattacharya, S; Dehkordi, A Mehdizadeh; Alshareef, Husam N. ( 0000-0001-5029-2142 ) ; Tritt, T M
Abstract:
The electronic transport properties of a series of Sr1-xYbxTiO3-delta (x = 0.05, 0.1) ceramics are investigated as a function of solid-state reaction (SSR) parameters, specifically calcination steps. It was found that the electrical conductivity (sigma) increases almost by a factor of 6, through the optimization of SSR parameters. The enhancement in the electrical conductivity leads to an enhancement in the thermoelectric power factor by a factor of 3. In addition, the lattice thermal conductivity (k(L)) of the Sr1-xYbxTiO3-delta ceramics is suppressed with increasing Yb-doping, supposedly due to heavier atomic mass of Yb substituted at the Sr site and a smaller ionic radii of Yb+3 with respect to Sr+2 ions. However, our model calculations indicate that strain-field effect, which occurs due to the difference in ionic radii, is the more prominent phonon scattering mechanism in the Yb-doped SrTiO3. This work is an extension of our previous study on the underlying phonon scattering mechanisms in the Y-doped SrTiO3, which would provide new insight into thermal transport in doped SrTiO3 and could be used as a guideline for more effective material synthesis.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Materials Science and Engineering Program; Functional Nanomaterials and Devices Research Group
Publisher:
IOP Publishing
Journal:
Journal of Physics D: Applied Physics
Issue Date:
22-Aug-2014
DOI:
10.1088/0022-3727/47/38/385302
Type:
Article
ISSN:
0022-3727; 1361-6463
Sponsors:
The current research is supported by KAUST-Clemson Faculty Initiated collaboration grant.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBhattacharya, Sen
dc.contributor.authorDehkordi, A Mehdizadehen
dc.contributor.authorAlshareef, Husam N.en
dc.contributor.authorTritt, T Men
dc.date.accessioned2015-08-24T08:34:04Zen
dc.date.available2015-08-24T08:34:04Zen
dc.date.issued2014-08-22en
dc.identifier.issn0022-3727en
dc.identifier.issn1361-6463en
dc.identifier.doi10.1088/0022-3727/47/38/385302en
dc.identifier.urihttp://hdl.handle.net/10754/575607en
dc.description.abstractThe electronic transport properties of a series of Sr1-xYbxTiO3-delta (x = 0.05, 0.1) ceramics are investigated as a function of solid-state reaction (SSR) parameters, specifically calcination steps. It was found that the electrical conductivity (sigma) increases almost by a factor of 6, through the optimization of SSR parameters. The enhancement in the electrical conductivity leads to an enhancement in the thermoelectric power factor by a factor of 3. In addition, the lattice thermal conductivity (k(L)) of the Sr1-xYbxTiO3-delta ceramics is suppressed with increasing Yb-doping, supposedly due to heavier atomic mass of Yb substituted at the Sr site and a smaller ionic radii of Yb+3 with respect to Sr+2 ions. However, our model calculations indicate that strain-field effect, which occurs due to the difference in ionic radii, is the more prominent phonon scattering mechanism in the Yb-doped SrTiO3. This work is an extension of our previous study on the underlying phonon scattering mechanisms in the Y-doped SrTiO3, which would provide new insight into thermal transport in doped SrTiO3 and could be used as a guideline for more effective material synthesis.en
dc.description.sponsorshipThe current research is supported by KAUST-Clemson Faculty Initiated collaboration grant.en
dc.publisherIOP Publishingen
dc.titleSynthesis–property relationship in thermoelectric Sr 1− x Yb x TiO 3− δ ceramicsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentFunctional Nanomaterials and Devices Research Groupen
dc.identifier.journalJournal of Physics D: Applied Physicsen
dc.contributor.institutionClemson Univ, Dept Phys & Astron, Clemson, SC 29634 USAen
dc.contributor.institutionClemson Univ, Dept Mat Sci & Engn, Clemson, SC 29634 USAen
kaust.authorAlshareef, Husam N.en
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