An apparatus for measuring the Seebeck coefficient and electrical conductivity is presented and characterized. The device can be used in a wide temperature range from room temperature to 1050 °C and in all common atmospheres, including oxidizing, reducing, humid, and inert. The apparatus is suitable for samples with different geometries (disk-, bar-shaped), allowing a complete thermoelectric characterization (including thermal conductivity) on a single sample. The Seebeck coefficient α can be measured in both sample directions (in-plane and cross-plane) simultaneously. Electrical conductivity is measured via the van der Pauw method. Perovskite-type CaMnO3 and the misfit cobalt oxide (Ca2CoO3)q(CoO2) are studied to demonstrate the temperature range and to investigate the variation of the electrical properties as a function of the measurement atmosphere.
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October 2014
Research Article|
October 15 2014
Versatile apparatus for thermoelectric characterization of oxides at high temperatures
Matthias Schrade;
Matthias Schrade
a)
Centre for Materials Science and Nanotechnology,
University of Oslo
, Gaustadalléen 21, 0349 Oslo, Norway
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Harald Fjeld;
Harald Fjeld
Centre for Materials Science and Nanotechnology,
University of Oslo
, Gaustadalléen 21, 0349 Oslo, Norway
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Truls Norby;
Truls Norby
Centre for Materials Science and Nanotechnology,
University of Oslo
, Gaustadalléen 21, 0349 Oslo, Norway
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Terje G. Finstad
Terje G. Finstad
Centre for Materials Science and Nanotechnology,
University of Oslo
, Gaustadalléen 21, 0349 Oslo, Norway
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a)
Electronic mail: [email protected]
Rev. Sci. Instrum. 85, 103906 (2014)
Article history
Received:
March 27 2014
Accepted:
September 28 2014
Citation
Matthias Schrade, Harald Fjeld, Truls Norby, Terje G. Finstad; Versatile apparatus for thermoelectric characterization of oxides at high temperatures. Rev. Sci. Instrum. 1 October 2014; 85 (10): 103906. https://doi.org/10.1063/1.4897489
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