Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties

Handle URI:
http://hdl.handle.net/10754/579840
Title:
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Authors:
Mehdizadeh Dehkordi, Arash; Bhattacharya, Sriparna; Darroudi, Taghi; Zeng, Xiaoyu; Alshareef, Husam N. ( 0000-0001-5029-2142 ) ; Tritt, Terry M.
Abstract:
We demonstrate a novel synthesis strategy for the preparation of Pr-doped SrTiO3 ceramics via a combination of solid state reaction and spark plasma sintering techniques. Polycrystalline ceramics possessing a unique morphology can be achieved by optimizing the process parameters, particularly spark plasma sintering heating rate. The phase and morphology of the synthesized ceramics were investigated in detail using X-ray diffraction, scanning electron microcopy and energy-dispersive X-ray spectroscopy It was observed that the grains of these bulk Pr-doped SrTiO3 ceramics were enhanced with Pr-rich grain boundaries. Electronic and thermal transport properties were also investigated as a function of temperature and doping concentration Such a microstructure was found to give rise to improved thermoelectric properties. Specifically, it resulted in a significant improvement in carrier mobility and the thermoelectric power factor. Simultaneously, it also led to a marked reduction in the thermal conductivity. As a result, a significant improvement (> 30%) in the thermoelectric figure of merit was achieved for the whole temperature range over all previously reported maximum values for SrTiO3-based ceramics. This synthesis demonstrates the steps for the preparation of bulk polycrystalline ceramics of non-uniformly Pr-doped SrTiO3.
KAUST Department:
Materials Science and Engineering Program
Citation:
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties 2015 (102) Journal of Visualized Experiments
Publisher:
MyJove Corporation
Journal:
Journal of Visualized Experiments
Issue Date:
15-Aug-2015
DOI:
10.3791/52869
Type:
Article
ISSN:
1940-087X
Additional Links:
http://www.jove.com/video/52869/synthesis-non-uniformly-pr-doped-srtio3-ceramics-their-thermoelectric
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMehdizadeh Dehkordi, Arashen
dc.contributor.authorBhattacharya, Sriparnaen
dc.contributor.authorDarroudi, Taghien
dc.contributor.authorZeng, Xiaoyuen
dc.contributor.authorAlshareef, Husam N.en
dc.contributor.authorTritt, Terry M.en
dc.date.accessioned2015-10-18T14:37:55Zen
dc.date.available2015-10-18T14:37:55Zen
dc.date.issued2015-08-15en
dc.identifier.citationSynthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties 2015 (102) Journal of Visualized Experimentsen
dc.identifier.issn1940-087Xen
dc.identifier.doi10.3791/52869en
dc.identifier.urihttp://hdl.handle.net/10754/579840en
dc.description.abstractWe demonstrate a novel synthesis strategy for the preparation of Pr-doped SrTiO3 ceramics via a combination of solid state reaction and spark plasma sintering techniques. Polycrystalline ceramics possessing a unique morphology can be achieved by optimizing the process parameters, particularly spark plasma sintering heating rate. The phase and morphology of the synthesized ceramics were investigated in detail using X-ray diffraction, scanning electron microcopy and energy-dispersive X-ray spectroscopy It was observed that the grains of these bulk Pr-doped SrTiO3 ceramics were enhanced with Pr-rich grain boundaries. Electronic and thermal transport properties were also investigated as a function of temperature and doping concentration Such a microstructure was found to give rise to improved thermoelectric properties. Specifically, it resulted in a significant improvement in carrier mobility and the thermoelectric power factor. Simultaneously, it also led to a marked reduction in the thermal conductivity. As a result, a significant improvement (> 30%) in the thermoelectric figure of merit was achieved for the whole temperature range over all previously reported maximum values for SrTiO3-based ceramics. This synthesis demonstrates the steps for the preparation of bulk polycrystalline ceramics of non-uniformly Pr-doped SrTiO3.en
dc.language.isoenen
dc.publisherMyJove Corporationen
dc.relation.urlhttp://www.jove.com/video/52869/synthesis-non-uniformly-pr-doped-srtio3-ceramics-their-thermoelectricen
dc.rightsArchived with thanks to Journal of Visualized Experimentsen
dc.subjectChemistryen
dc.subjectIssue 102en
dc.subjectOxide Thermoelectricsen
dc.subjectPraseodymiumen
dc.subjectSrTiO3en
dc.subjectEnhanced Figure of Meriten
dc.subjectEnhanced Power Factoren
dc.subjectN-type Semiconductoren
dc.subjectMobility Enhancementen
dc.subjectGrain Boundary Engineeringen
dc.titleSynthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Propertiesen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalJournal of Visualized Experimentsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Materials Science and Engineering, Clemson Universityen
dc.contributor.institutionDepartment of Physics and Astronomy, Clemson Universityen
dc.contributor.institutionElectron Microscope Facility, Clemson Universityen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAlshareef, Husam N.en
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