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Simultaneous measurement of all thermoelectric properties of bulk materials in the temperature range 300-600 K

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Title Simultaneous measurement of all thermoelectric properties of bulk materials in the temperature range 300-600 K
 
Creator KOLB, H
DASGUPTA, T
ZABROCKI, K
MUELLER, E
DE BOOR, J
 
Subject THERMAL-CONDUCTIVITY
TRANSPORT-PROPERTIES
SEEBECK COEFFICIENT
RESISTIVITY
FIGURE
MERIT
 
Description Thermoelectric materials can directly convert heat into electrical energy. The characterization of different materials is an important part in thermoelectric materials research to improve their properties. Usually, different methods and setups are combined for the temperature dependent determination of all thermoelectric key quantities - Seebeck coefficient, electrical conductivity, and thermal conductivity. Here, we present a measurement system for the simultaneous determination of all of these quantities plus the direct determination of the figure of merit by means of the Harman method (zT)(H) in a temperature range from room temperature up to 600 K. A simultaneous measurement saves time and reduces the measurement error, and the change of all material properties can be monitored even for unstable materials. Thermal conductivity measurements are inherently affected by undesired thermal losses, in particular, through radiation at higher temperatures. We show a simple experimental approach to measure radiation losses and correct for those. Comparative measurements on traditional systems show good agreement for all measured quantities. (C) 2015 AIP Publishing LLC.
 
Publisher AMER INST PHYSICS
 
Date 2016-01-15T07:44:09Z
2016-01-15T07:44:09Z
2015
 
Type Article
 
Identifier REVIEW OF SCIENTIFIC INSTRUMENTS, 86(7)
0034-6748
1089-7623
http://dx.doi.org/10.1063/1.4926404
http://dspace.library.iitb.ac.in/jspui/handle/100/18081
 
Language en