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Processing and Characterization of Nano-structured ZrO<sub>2</sub>/CoSb<sub>3</sub> Thermoelectric Composites

He, Zeming and Stiewe, Christian and Li, Shanghua and Platzek, Dieter and Karpinski, Gabriele and Müller, Eckhard and Toprak, Muhammed and Muhammed, Mamoun (2006) Processing and Characterization of Nano-structured ZrO<sub>2</sub>/CoSb<sub>3</sub> Thermoelectric Composites. In: Proceedings of the 4th European Conference on Thermoelectrics. 4th European Conference on Thermoelectrics, 9.-11. April 2006, Cardiff, Wales, UK.

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Abstract

The addition of ceramic inclusion to a thermoelectric matrix could reduce the thermal conductivity of the composite, which is attributed to phonon scattering on the generated interfaces. The electrical conductivity of the composite, however, could also be reduced due to additional charge carrier scattering. The performance of the thermoelectric composite, therefore, depends on the resulting ratio of electrical conductivity to thermal conductivity, which results from the entire scattering effects on phonons and charge carriers. In the present work, nano-sized ZrO2 powders of different contents were dispersed into sub-micron-sized CoSb3 powders via ball milling. The as-milled powders were consolidated into dense compacts by hot pressing. The phase, the microstructure, and the thermoelectric properties of the prepared compacts were characterized. The correlation of phase, microstructure, and thermoelectric properties (electrical conductivity, thermal conductivity, and ratio of electrical conductivity to thermal conductivity), with the ceramic content and sintering temperature is presented. The results show how the performance of the investigated thermoelectric composites can be affected by the dispersion of nano-sized ceramic inclusions. It is noted that the selection of appropriate inclusion content is crucial to maintaining or improving the ratio of electrical conductivity to thermal conductivity.

Item URL in elib:https://elib.dlr.de/45908/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Processing and Characterization of Nano-structured ZrO<sub>2</sub>/CoSb<sub>3</sub> Thermoelectric Composites
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
He, ZemingUNSPECIFIEDUNSPECIFIED
Stiewe, ChristianUNSPECIFIEDUNSPECIFIED
Li, ShanghuaMaterials Chemistry Division, Royal Institute of Technology (KTH), SE-10044 Stockholm, SwedenUNSPECIFIED
Platzek, DieterUNSPECIFIEDUNSPECIFIED
Karpinski, GabrieleUNSPECIFIEDUNSPECIFIED
Müller, EckhardUNSPECIFIEDUNSPECIFIED
Toprak, MuhammedMaterials Chemistry Division, Royal Institute of Technology (KTH), SE-10044 Stockholm, SwedenUNSPECIFIED
Muhammed, MamounMaterials Chemistry Division, Royal Institute of Technology (KTH), SE-10044 Stockholm, SwedenUNSPECIFIED
Date:11 April 2006
Journal or Publication Title:Proceedings of the 4th European Conference on Thermoelectrics
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Rowe, D.M.UNSPECIFIED
Status:Published
Keywords:thermoelectric materials, sintering, skutterudites, hot press, automatic regime
Event Title:4th European Conference on Thermoelectrics
Event Location:Cardiff, Wales, UK
Event Type:international Conference
Event Dates:9.-11. April 2006
Organizer:Cardiff School of Engineering
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional Ceramics
Deposited By: Stiewe, Dr.rer.nat Christian
Deposited On:06 Dec 2006
Last Modified:27 Apr 2009 13:17

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