Journal
ACTA MATERIALIA
Volume 57, Issue 11, Pages 3135-3139Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.03.018
Keywords
Thermoelectric; Filled-skutterudite; Transport properties
Funding
- National Basic Research Program of China (973 program) [2007CB607502, 2007CB607503]
- Funds for Creative Research Groups of China [500821004]
- GM
- DOE [DE-FC26-04NT42278]
Ask authors/readers for more resources
Single-phase polycrystalline dual-element-filled skutterudites BaxCeyCo4Sb12 (0 < x < 0.4, 0 < y < 0.1) are synthesized by the melting-quenching-annealing and spark plasma sintering methods. The electrical conductivity, Seebeck coefficient, thermal conductivity and low-temperature Hall data of these compounds are reported. Our results suggest that there is essentially no difference in electrical transport properties between the dual-element-filled BaxCeyCo4Sb12 and single-element-filled BayCo4Sb12 systems. The Ba-Ce co-filling is more effective in lattice thermal conductivity reduction than Ba single filling in the temperature range of 300-850 K. Very low lattice thermal conductivity values less than 2.0 W m(-1) K-1 are obtained at room temperature. Consequently, enhanced thermoelectric figure of merits (ZT) for these dual-element-filled CoSb3 skutterudites are achieved at elevated temperatures, in particular ZT=1.26 at 850 K for Ba0.18Ce0.05Co4Sb12.02. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available