Enhanced Thermoelectric Figure of Merit in BaxYbyCo4Sb12 Skutterudites
- 1 January 2007
- journal article
- Published by Springer Nature in MRS Proceedings
- Vol. 1044
Abstract
We report on the development of an efficient n-type skutterudite based on the double-filled structure of CoSb3. The chosen filler species Ba and Yb have a large phonon contrast and this combination is very effective in lowering the lattice thermal conductivity. The highest figure of merit in excess of 1.3 is obtained near 800K and the figure of merit greater than unity persists down to temperatures of about 550K. The compounds are synthesized with high purity Co (99.998%) and Sb (99.9999%). In order to reduce the cost of the materials, we have also prepared filled skutterudites of similar composition but using less pure Co (99.8%) and Sb (99.999%). The figure of merit of these lower purity compounds reaches ZT = 1 at 800K with the materials' cost dramatically reduced.Keywords
This publication has 11 references indexed in Scilit:
- Dual-frequency resonant phonon scattering in BaxRyCo4Sb12 (R=La, Ce, and Sr)Applied Physics Letters, 2007
- Filling Fraction Limit for Intrinsic Voids in Crystals: Doping in SkutteruditesPhysical Review Letters, 2005
- High-temperature thermoelectric properties of n-type BayNixCo4−xSb12Journal of Materials Research, 2001
- Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12Journal of Applied Physics, 2001
- High figure of merit in partially filled ytterbium skutterudite materialsApplied Physics Letters, 2000
- Filled skutterudite antimonides: Electron crystals and phonon glassesPhysical Review B, 1997
- Low-temperature transport properties of the filled skutterudites sPhysical Review B, 1997
- Filled Skutterudite Antimonides: A New Class of Thermoelectric MaterialsScience, 1996
- Low temperature properties of the filled skutterudite CeFe4Sb12Journal of Applied Physics, 1995
- LaFe4P12 with filled CoAs3-type structure and isotypic lanthanoid–transition metal polyphosphidesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1977