Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-25T15:38:56.796Z Has data issue: false hasContentIssue false
  • English
  • Français

A New Class of Materials with Promising Thermoelectric Properties: MNiSn (M = Ti, Zr, Hf)

Published online by Cambridge University Press:  15 February 2011

H. Hohl ,
A. P. Ramirez ,
W. Kaefer ,
K. Fess ,
Ch. Thurner ,
Ch. Kloc  and
E. Bucher
H. Hohl
Affiliation:
Lucent Technologies, Bell Laboratories, 700 Mountain Avenue, Murray Hill, NJ 07974
A. P. Ramirez
Affiliation:
Lucent Technologies, Bell Laboratories, 700 Mountain Avenue, Murray Hill, NJ 07974
W. Kaefer
Affiliation:
University of Konstanz, Faculty of Physics, P.O. Box 5560, D-78457 Konstanz, Germany
K. Fess
Affiliation:
University of Konstanz, Faculty of Physics, P.O. Box 5560, D-78457 Konstanz, Germany
Ch. Thurner
Affiliation:
University of Konstanz, Faculty of Physics, P.O. Box 5560, D-78457 Konstanz, Germany
Ch. Kloc
Affiliation:
University of Konstanz, Faculty of Physics, P.O. Box 5560, D-78457 Konstanz, Germany
E. Bucher
Affiliation:
Lucent Technologies, Bell Laboratories, 700 Mountain Avenue, Murray Hill, NJ 07974 University of Konstanz, Faculty of Physics, P.O. Box 5560, D-78457 Konstanz, Germany
Get access

Abstract

TiNiSn, ZrNiSn and HfNiSn are members of a large group of intermetallic compounds which crystallize in the cubic MgAgAs-type structure. Polycrystalline samples of these compounds have been prepared and investigated for their thermoelectric properties. With thermopowers of about –200 μV/K and resistivities of a few mΩcm, power factors S2/ρ as high as 38 μW/K2 cm were obtained at 700 K. These remarkably high power factors are, however, accompanied by a thermal conductivity which is too high for applications. In order to reduce the parasitic lattice thermal conductivity, solid solutions Zrl−xHfxNiSn, Zrl−xTixNiSn, and Hfl−xTixNiSn were formed. The figure of merit of Zr0.5Hf0.5NiSn at 700 K (ZT = 0.41) exceeds the end members ZrNiSn (ZT = 0.26) and HfNiSn (ZT = 0.22).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 478: Symposium Q – Thermoelectric Materials - New Directions and Approaches , 1997 , 109
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Jeitschko, W., Metall. Trans. 1, 3159 (1970).Google Scholar
2. Villars, P. and Calvert, L. D., Pearson's Handbook of Crystallographic Data for Intermetallic Phases, 2nd ed., Vol.1–4 (ASM International, Ohio, 1991).Google Scholar
3. Dudkin, L. D., Dashevskii, Z. M., and Skolozdra, R. V., Inory. Mater. 29, 249 (1993).Google Scholar
4. A statistical distribution of occupied sites is found in the (1/4,1/4,1/4) and the (3/4, 3/4, 3/4) sublattices of TiNiSn, TiCoSn, and TiIrSn [5].Google Scholar
5. Stadnyk, Yu. V., Mykhailiv, L. A., Kuprina, V. V., and Skolozdra, R. V., Inorg. Mater. 24, 1196 (1989).Google Scholar
6. Aliev, F. G., Brandt, N. B., Moshchalkov, V. V., IKozyrkov, V. V., Skolozdra, R. V., and Belogorokhov, A. I., Z. Phys. B 75, 167 (1989).Google Scholar
7. Aliev, F. G., Kozyrkov, V. V., Moshchalkov, V. V., Scolozdra, R. V.. and Durczewski, K., Z. Phys. B 80, 353 (1990).Google Scholar
8. Kloc, Ch., Fess, K., Kaefer, W., Friemelt, K., Riazi-Nejad, H., and Bucher, E., in Proc. XV International Conference on Thermoelectrics, ICT96, March 26–29, 1996, Pasadenaa, CA, pp. 155–158.Google Scholar