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p-Type skutterudites RxMy Fe3CoSb12 (R, M = Ba, Ce, Nd, and Yb): Effectiveness of double-filling for the lattice thermal conductivity reduction
- Source :
-
Intermetallics . Nov2011, Vol. 19 Issue 11, p1747-1751. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: Ab-initio calculations of the resonant modes and frequencies for a number of possible fillers in p-type RFe3CoSb12 and RFe4Sb12 were carried out. The results indicate that, although the exact values of fillers’ resonant frequencies in p-type skutterudites are somewhat different from those in n-type Co-based skutterudites, the Einstein-like resonant modes of the fillers are similar to those in n-type materials. Experimentally, several pairs of the fillers were selected and double-filled p-type skutterudite compounds RxMy Fe3CoSb12 (R, M = Ba, Ce, Nd, and Yb) were successfully synthesized. The reduction in the lattice thermal conductivity was realized by extending the range of resonant frequencies. As a result, enhanced ZT values above unity were achieved in these double-filled p-type skutterudites. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09669795
- Volume :
- 19
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Intermetallics
- Publication Type :
- Academic Journal
- Accession number :
- 65043914
- Full Text :
- https://doi.org/10.1016/j.intermet.2011.06.010