Traceable Measurements of Seebeck Coefficients of Thermoelectric Materials by Using Noble Metal Thermocouples

The characterization of thermoelectric materials as reference materials for Seebeck coefficients at the Physikalisch-Technische Bundesanstalt (PTB) is based on the usage of gold/platinum differential thermocouples. In the case of thermoelectric materials containing silicon, the gold/platinum thermoc...

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Bibliographic Details
Published in:International journal of thermophysics 2018-06, Vol.39 (6), p.1-8, Article 72
Main Authors: Haupt, Sebastian, Edler, Frank
Format: Article
Language:English
Subjects:
Classical Mechanics
Condensed Matter Physics
Geophysics
Gold
Industrial Chemistry/Chemical Engineering
Materials traceability
Noble metals
Palladium
Physical Chemistry
Physics
Physics and Astronomy
Platinum
Reference materials
Seebeck effect
Silicon
Thermal analysis
Thermocouples
Thermodynamics
Thermoelectric materials
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Summary:The characterization of thermoelectric materials as reference materials for Seebeck coefficients at the Physikalisch-Technische Bundesanstalt (PTB) is based on the usage of gold/platinum differential thermocouples. In the case of thermoelectric materials containing silicon, the gold/platinum thermocouples are insufficient due to reactions with the silicon when the samples are at higher temperatures. To overcome this limitation and to expand the temperature range for the certification process, platinum/palladium thermocouples were incorporated in the measurement setup. This paper discusses the influence of the different differential thermocouples used for the measurement of the Seebeck coefficients. Results of a comparative investigation of Seebeck coefficient measurements of a metallic and two semiconducting reference materials in the temperature range from 300 K to 870 K are presented.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-018-2394-z