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Erbium boride composites with high ZT values at 800 K

Published online by Cambridge University Press:  20 March 2013

Frederick C. Stober  and
Barbara R. Albert
Frederick C. Stober
Affiliation:
Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Technische Universität Darmstadt, Petersenstr. 18, 64287 Darmstadt, Germany Bosch Solar CISTech GmbH, Münstersche Str. 24, 14772 Brandenburg an der Havel, Germany
Barbara R. Albert
Affiliation:
Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Technische Universität Darmstadt, Petersenstr. 18, 64287 Darmstadt, Germany
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Abstract

Single phase erbium borides ErB2, ErB4, and ErB12 show Seebeck coefficients and power factors with absolute values that are significantly lower than those of a stable Er-B multi phase composite obtained through high temperature solid-solid reaction from the elements (molar ratio Er:B = 1:6). According to quantitative Rietveld analysis the composite consists of erbium diboride (1 %), tetraboride (83 %), and dodecaboride (16 %), and the measurement of the electrical conductivities, Seebeck coefficients, and thermal conductivities leads to ZT values as high as 0.53 at 830 K. Such refractory materials can be used for energy conversion in a range of high temperatures that are otherwise difficult to address.

Keywords

BthermoelectricityEr
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1490: Symposium B – Thermoelectric Materials Research and Device Development for Power Conversion and Refrigeration , 2013 , pp. 41 - 44
Copyright
Copyright © Materials Research Society 2013 

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References

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