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High Temperature Transport Probe for Thermopower and Resistmty Measurements

Published online by Cambridge University Press:  10 February 2011

R. T. Littleton ,
Jason Jeffries ,
Michael A. Kaeser ,
Michael Long  and
Terry M. Tritt
R. T. Littleton
Affiliation:
Materials Science and Engineering Department
Jason Jeffries
Affiliation:
Department of Physics and Astronomy Clemson University, Clemson, SC 29634 USA
Michael A. Kaeser
Affiliation:
Department of Physics and Astronomy Clemson University, Clemson, SC 29634 USA
Michael Long
Affiliation:
Department of Physics and Astronomy Clemson University, Clemson, SC 29634 USA
Terry M. Tritt
Affiliation:
Department of Physics and Astronomy Clemson University, Clemson, SC 29634 USA
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Abstract

We have recently developed a device to measure resistivity and Seebeck values of a material as a function of temperature over a range of 80K < T < 700K. These measurements overlap in temperature with our existing apparatus (4K < T < 320K). These measurements are necessary for the investigation of potential thermoelectric materials at elevated temperatures, where power generation applications are important. The probe design allows for various types of samples to be evaluated from needle like samples ( L ≈ 2mm, D ≈ 50μm ) to larger pressed pellet samples ( ≈ 2mm × 2mm × 10mm). Separate high temperature cartridge heaters are used to stabilize both the absolute temperature, T, as well as the temperature difference, ΔT. Thermocouples measuring T+ΔT/2 and T-ΔT/2 are also employed to measure sample voltages for resistance and thermoelectric power. Design details and measurement specifics will be discussed. Data taken on standards a well as some research samples will be presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 545: Symposium Z – Thermoelectric Materials 1998 - The Next Generation… , 1998 , 137
Copyright
Copyright © Materials Research Society 1999

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