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Tailoring the mechanical properties of thermoelectric lead telluride by alloying with non-doping calcium

Schmitz, Andreas and de Boor, Johannes and Mull, Klaus and Müller, Eckhard (2016) Tailoring the mechanical properties of thermoelectric lead telluride by alloying with non-doping calcium. Journal of Materials Science, 51 (14), pp. 6933-6943. Springer. DOI: 10.1007/s10853-016-9980-x ISSN 0022-2461

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1007/s10853-016-9980-x

Abstract

Thermoelectric generators have a great potential in waste heat recovery and energy harvesting due to their principle of directly converting thermal into electrical energy. Despite a long history in space travel and a broad range of potential applications, TEGs are rarely found in terrestrial applications. Reasons are manufacturing problems and limited durability in dynamic operation conditions due to deficient mechanical properties of the thermoelectric materials, which often suffer from low strength and high brittleness. We present a concept for the basically independent tailoring of mechanical and thermoelectric properties. This can be achieved by the alloying of TE materials with additional elements having preferably no or only little influence on the TE properties. We demonstrate a route of improving the mechanical properties of PbTe by alloying with calcium. It is shown that calcium has minor effects on the thermoelectric properties of PbTe while significantly increasing hardness and fracture strength. As proof of concept, mechanically more stable sodium and calcium co-doped Pb0.966Ca0.02Na0.014Te with ZT exceeding 1.2 above 650 K is demonstrated.

Item URL in elib:https://elib.dlr.de/108663/
Document Type:Article
Title:Tailoring the mechanical properties of thermoelectric lead telluride by alloying with non-doping calcium
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmitz, AndreasGerman aerospace center, Institute of materials research, Köln, GermanyUNSPECIFIED
de Boor, JohannesGerman aerospace center, Institute of materials research, Köln, GermanyUNSPECIFIED
Mull, KlausGerman aerospace center, Institute of materials research, Köln, GermanyUNSPECIFIED
Müller, EckhardGerman aerospace center, Institute of materials research, Köln, Germany and Justus Liebig university Giessen, Institute of inorganic and analytical chemistry, 35392 Giessen, GermanyUNSPECIFIED
Date:20 April 2016
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:51
DOI :10.1007/s10853-016-9980-x
Page Range:pp. 6933-6943
Publisher:Springer
ISSN:0022-2461
Status:Published
Keywords:Thermoelectric Materials, Lead telluride, Alloying, Mechanical properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC-Antriebsstrang (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:01 Dec 2016 09:52
Last Modified:06 Sep 2019 15:27

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