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Thermoelectric transport and microstructure of optimized Mg2Si0.8Sn0.2

de Boor, Johannes and Gupta, S. and Kolb, Hendrik and Dasgupta, Titas and Müller, Eckhard (2015) Thermoelectric transport and microstructure of optimized Mg2Si0.8Sn0.2. Journal of Materials Chemistry C, 3 (40), pp. 10467-10475. Royal Society of Chemistry. DOI: 10.1039/C5TC01535A ISSN 2050-7526

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Abstract

Solid solutions of magnesium silicide and magnesium stannide exhibit excellent thermoelectric properties due to favorable electronic band structures and reduced thermal conductivity compared to the binary compounds. We have optimized the composition Mg2Si0.8Sn0.2 by Sb doping and obtained a thermoelectric figure of merit close to unity. The material comprises of several phases and exhibits intrinsic nanostructuring. Nevertheless, the main features of electronic transport can be understood within the framework of a single parabolic band model. Compared to Mg2Si we observe a comparable power factor, a drastically reduced thermal conductivity and an increased effective mass.

Item URL in elib:https://elib.dlr.de/100136/
Document Type:Article
Title:Thermoelectric transport and microstructure of optimized Mg2Si0.8Sn0.2
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de Boor, JohannesGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Gupta, S.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Kolb, HendrikGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Dasgupta, TitasDepartment of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, IndiaUNSPECIFIED
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:9 July 2015
Journal or Publication Title:Journal of Materials Chemistry C
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:3
DOI :10.1039/C5TC01535A
Page Range:pp. 10467-10475
Publisher:Royal Society of Chemistry
ISSN:2050-7526
Status:Published
Keywords:thermoelectric materials, magnesium silicide
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 - Fahrzeugenergiesystem III (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Zabrocki, Dr. Knud
Deposited On:07 Jan 2016 08:16
Last Modified:08 Mar 2018 18:38

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