Skip to main content Accessibility help
×
Home

Thermoelectric Figure of Merit, ZT, of Single Crystal Pentatellurides (MTe5-XSex: M = Hf, Zr and x = 0, 0.25)

  • R. T. Littleton (a1), Terry M. Tritt (a1) (a2), B. Zawilski (a2), J. W. Kolis (a1) (a3), D. R. Ketchum (a3) and M. Brooks Derrick (a3)...

Abstract

The thermoelectric figure of merit, ZT = α2σT/λ, has been measured for pentatelluride single crystals of HfTe5, ZrTe5, as well as Se substituted pentatellurides. The parent materials, HfTe5 and ZrTe5, exhibit relatively large p- and n- type thermopower, |a| > 125 μV/K, and low resistivity, ρ ≤ 1 mΩ•cm. These values lead to a large power factor (α2σT) which is substantially increased with proper Se substitution on the Te sites. The thermal conductivity of these needle-like crystals has also been measured as a function of temperature from 10 K ≤ T ≤ 300 K. The room temperature figure of merit for these materials varies from ZT “0.1 for the parent materials to ZT ≈ 0.25 for Se substituted samples. These results as well as experimental procedures will be presented and discussed.

Copyright

References

Hide All
1. DiSalvo, F. J., Science, 285, 703–6 (1999).
2. Chung, D. Y., Hogan, T., Brazis, P., Rocci-Lane, M., Kannewurf, C., Bastea, M., Uher, C., and Kanatzidis, M. G., Science, 287, 1024–7 (2000.)
3. Tritt, T. M., Science, 283, 804–5 (1999).
4. New Materials and Performance Limits for Thermoelectric Cooling, Slack, G. A., in CRC Handbook of Thermoelectrics, Rowe ed. p 407–4 (1995).
5. Littleton, R. T., Kolis, J. W., Feger, C. R. and Tritt, T.M., MRS 1998: Thermoelectric Materials 1998. edited by Tritt, T. M. et. al. Vol. 545, p 381396 (1998).
6. Littleton, R. T., Tritt, T. M., Feger, C. R., Kolis, J., Wilson, M. L., Marone, M., Payne, J., Verebeli, D., and Levy, F., Appl. Phys. Lett., 72, 2056–8 (1998).
7. Littleton, R. T., Tritt, T. M., Kolis, J. W., and Ketchum, D., Phys. Rev. B., 60, 13453–7 (1999).
8. Tritt, T. M., Lowhorn, N. D., Littleton, R. T., Pope, A., Feger, C. R., and Kolis, J. W., Phys. Rev. B., 60, 7816–9 (1999).
9. Levy, F. and Berger, H., J. Cryst. Growth, 61, 61–8 (1983).
10. Furuseth, S., Brattas, L., and Kjekshus, A., Acta. Chem. Scand., 27, 23672374 (1973).
11. Zawilski, B., Littleton, R. T., and Tritt, T. M., Rev. Sci. Instrum., in progress (2000).
12. Zawilski, B., Littleton, R. T., and Tritt, T. M., MRS, this proceeding, (2000).

Thermoelectric Figure of Merit, ZT, of Single Crystal Pentatellurides (MTe5-XSex: M = Hf, Zr and x = 0, 0.25)

  • R. T. Littleton (a1), Terry M. Tritt (a1) (a2), B. Zawilski (a2), J. W. Kolis (a1) (a3), D. R. Ketchum (a3) and M. Brooks Derrick (a3)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed