Measurement of Thermal Conductivity Using Steady-State Isothermal Conditions and Validation by Comparison
with Thermoelectric Device Performance |
| |
Authors: | Patrick J Taylor Jay R Maddux Parvez N Uppal |
| |
Affiliation: | 1. Sensors and Electron Devices Directorate, US Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD, 20783, USA
|
| |
Abstract: | A new technique for measuring thermal conductivity with significantly improved accuracy is presented. By using the Peltier effect to counterbalance an imposed temperature difference, a completely isothermal, steady-state condition can be obtained across a sample. In this condition, extraneous parasitic heat flows that would otherwise cause error can be eliminated entirely. The technique is used to determine the thermal conductivity of p-type and n-type samples of (Bi,Sb)2(Te,Se)3 materials, and thermal conductivity values of 1.47?W/m?K and 1.48?W/m?K are obtained respectively. To validate this technique, those samples were assembled into a Peltier cooling device. The agreement between the Seebeck coefficient measured individually and from the assembled device were within 0.5%, and the corresponding thermal conductivity was consistent with the individual measurements with less than 2% error. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|