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Preparation of Ring-Shaped Thermoelectric Legs from PbTe Powders for Tubular Thermoelectric Modules

Schmitz, A. and Stiewe, C. and Müller, E. (2013) Preparation of Ring-Shaped Thermoelectric Legs from PbTe Powders for Tubular Thermoelectric Modules. Journal of Electronic Materials, 42 (7), pp. 1702-1708. Springer. DOI: 10.1007/s11664-012-2402-1 ISSN 0361-5235

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Abstract

Waste heat recovery—for example, in automotive applications—is a major field for thermoelectric research and future application. Commercially available thermoelectric modules are based on planar structures, whereas tubular modules may have advantages for integration and performance in the field of automotive waste heat recovery. One major drawback of tubular generator designs is the necessity for ring-shaped legs made from thermoelectric material. Cutting these geometries from sintered tablets leads to considerable loss of thermoelectric material and therefore high cost. Direct sintering of ring-shaped legs or tubes of thermoelectric material is a solution to this problem. However, sintering such rings with high homogeneity and density faces some difficulties related to the mechanical properties of typical thermoelectric materials such as lead telluride (PbTe)—particularly brittleness and high coefficient of thermal expansion. This work shows a process for production of thermoelectric rings made of p- and n-doped PbTe. Long tubes of PbTe have been sintered in a current-assisted sintering process with specially designed sintering molds, coated with a diffusion barrier, and finally cut into ring-shaped slices. To demonstrate the technology, a tubular thermoelectric module has been assembled using these PbTe rings.

Item URL in elib:https://elib.dlr.de/85749/
Document Type:Article
Title:Preparation of Ring-Shaped Thermoelectric Legs from PbTe Powders for Tubular Thermoelectric Modules
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmitz, A.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Stiewe, C.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Müller, E.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Date:30 January 2013
Journal or Publication Title:Journal of Electronic Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:42
DOI :10.1007/s11664-012-2402-1
Page Range:pp. 1702-1708
Publisher:Springer
ISSN:0361-5235
Status:Published
Keywords:Thermoelectric generator TEG waste heat recovery sintering lead telluride thermoelectric module tubular module lead telluride rings SPS
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 - Project Fahrzeugenergiesysteme III (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Zabrocki, Dr. Knud
Deposited On:27 Nov 2013 14:41
Last Modified:27 Nov 2013 14:41

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