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Apparatus for the high temperature measurement of the Seebeck coefficient in thermoelectric materials

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1 Author(s)
Martin, Joshua ; Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

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The Seebeck coefficient is a physical parameter routinely measured to identify the potential thermoelectric performance of a material. However, researchers employ a variety of techniques, conditions, and probe arrangements to measure the Seebeck coefficient, resulting in conflicting materials data. To compare and evaluate these methodologies, and to identify optimal Seebeck coefficient measurement protocols, we have developed an improved experimental apparatus to measure the Seebeck coefficient under multiple conditions and probe arrangements (300 K–1200 K). This paper will describe in detail the apparatus design and instrumentation, including a discussion of its capabilities and accuracy as measured through representative diagnostics. In addition, this paper will emphasize the techniques required to effectively manage uncertainty in high temperature Seebeck coefficient measurements.

Published in:

Review of Scientific Instruments  (Volume:83 ,  Issue: 6 )