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Proceedings Paper

Novel methodology to determine thermal conductivity of thermoelectric materials and comparison with device performance
Author(s): Jay R. Maddux; Patrick J. Taylor
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Paper Abstract

Accuracy of thermal conductivity measurements is an ongoing area of controversy in thermoelectric materials development. In this work, we demonstrate a novel steady-state method for characterizing thermal conductivity of bulk materials and devices under isothermal and near-isothermal conditions. The isothermal condition is achieved by exactly balancing Peltier heat flow against an externally imposed heat flow in the material. Under steady-state, isothermal conditions, heat flow in the material can be determined with high accuracy because external parasitic heat flows become negligible. We compare our results with conventional measurement techniques and also with measured thermoelectric device performance. Agreement between predicted and measured thermoelectric cooler performance is within 2%. Results for thermoelectric power generators will also be discussed.

Paper Details

Date Published: 24 May 2012
PDF: 8 pages
Proc. SPIE 8377, Energy Harvesting and Storage: Materials, Devices, and Applications III, 83770I (24 May 2012); doi: 10.1117/12.921346
Show Author Affiliations
Jay R. Maddux, U.S. Army Research Lab. (United States)
Patrick J. Taylor, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 8377:
Energy Harvesting and Storage: Materials, Devices, and Applications III
Nibir K. Dhar; Priyalal S. Wijewarnasuriya; Achyut K. Dutta, Editor(s)

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