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Promising Bulk Nanostructured Thermoelectrics

Muhammed, Mamoun and Toprak, Muhammet and Li, Shanghua and Stiewe, Christian and Platzek, Dieter and Müller, Eckhard (2006) Promising Bulk Nanostructured Thermoelectrics. 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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Nanostructured bulk thermoelectrics have not been paid the attention they deserve for quite a long time probably due to the limitations of methods available for producing TE materials. We have established an international consortium and worked extensively on the fabrication, evaluation and modeling of nanostructured CoSb3 based skutterudite materials. Selection of material is based on the theoretically predicted lower thermal conductivity of the material which in turn could lead to an increase in the materials’ figure of merit. We proved the fact that nanostructured bulk skutterudites have much lower thermal conductivities than their larger size counterparts. The work also focused on improving the electrical conductivity by introducing substitutional and interstitial doping atoms into the lattice. The influence of addition of highly conducting metallic phases like Au, and Sb as well as insulator phases like CoSb2 and ZrO2 on the transport properties have been investigated on few samples. A very high ZT value of 0.65 was obtained for an unfilled skutterudite material with a combined doping of Ni and Te for Co and Sb respectively. This paper summarizes the work performed with the adapted synthesis approach, some representative results, and future prospects.

Item URL in elib:https://elib.dlr.de/45930/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Promising Bulk Nanostructured Thermoelectrics
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Muhammed, MamounMaterials Science, KTH, Stockholm, SwedenUNSPECIFIED
Toprak, MuhammetMaterials Science, KTH, Stockholm, SwedenUNSPECIFIED
Li, ShanghuaMaterials Science, KTH, 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 ISI Web of Science:No
EditorsEmailEditor's ORCID iD
Keywords:thermoelectric materials, Skutterudites, doping, thermoelectric properties, Nano-Structure, Antimonides
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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