elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Tin Telluride-Based Nanocomposites of the Type AgSnmBiTe2+m (BTST-m) as Effective Lead-Free Thermoelectric Materials

Falkenbach, Oliver and Schmitz, Andreas and Dankwort, Torben and Koch, Guenter and Kienle, Lorenz and Müller, Eckhard and Schlecht, Sabine (2015) Tin Telluride-Based Nanocomposites of the Type AgSnmBiTe2+m (BTST-m) as Effective Lead-Free Thermoelectric Materials. Chemistry of Materials, 27 (21), pp. 7296-7305. ACS Publications. DOI: 10.1021/acs.chemmater.5b02329 ISSN 0897-4756

Full text not available from this repository.

Abstract

In the medium temperature range tin telluride has emerged as a compensational thermoelectric material for the well established compound lead telluride. We present tin telluride-based nanocomposites of the composition AgSnmBiTe2+m (Bismuth–Tin–Silver–Tellurium, BTST-m) showing superior thermoelectric performance. Nanopowders with varying concentration ratios between silver bismuth telluride and tin telluride were synthesized by mechanical alloying. Three different compacting routes were applied: cold pressing/annealing, hot pressing, and short-term sintering. A strong interdependence between the compacting method and thermoelectric properties was found with hot pressed and short-term sintered samples exhibiting the best results. Alike for the already known antimony analogue, ZT could be increased to around 1. Scanning electron microscopy indicates that the observed tremendous reduction of thermal conductivity originates from precipitation of nanoparticles and a high number of grain boundaries. Powder X-ray diffraction and transmission electron microscopy revealed the formation of the rock salt-type structure with linearly varying lattice parameters depending on m according to a solid solution, in agreement with a microscopically homogeneous spatial distribution of the constituting elements. However, imaging on the nanostructure shows the formation of coherently ingrown nanoinclusions and diffuse scattering as an indication of short-range ordering.

Item URL in elib:https://elib.dlr.de/100140/
Document Type:Article
Title:Tin Telluride-Based Nanocomposites of the Type AgSnmBiTe2+m (BTST-m) as Effective Lead-Free Thermoelectric Materials
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Falkenbach, OliverJustus-Liebig University, Institute for Inorganic and Analytical ChemistryUNSPECIFIED
Schmitz, AndreasGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Dankwort, TorbenInstitute for Material Science, Christian-Albrechts-University, Kaiserstrasse 2, D-24143 Kiel, GermanyUNSPECIFIED
Koch, GuenterInstitute for Inorganic and Analytical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 58, D-35392 Giessen, Hessen, GermanyUNSPECIFIED
Kienle, LorenzInstitute for Material Science, Christian-Albrechts-University, Kaiserstrasse 2, D-24143 Kiel, Schleswig-Holstein, 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
Schlecht, SabineInstitute of Inorganic and Analytical Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 58, 35392 Gießen, GermanyUNSPECIFIED
Date:14 October 2015
Journal or Publication Title:Chemistry of Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:27
DOI :10.1021/acs.chemmater.5b02329
Page Range:pp. 7296-7305
Publisher:ACS Publications
ISSN:0897-4756
Status:Published
Keywords:thermoelectric materials, bismuth, tin, silver, tellurium
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:30 Nov 2015 08:47
Last Modified:06 Sep 2019 15:19

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.