CaltechAUTHORS
  A Caltech Library Service

High-temperature electrical and thermal transport properties of fully filled skutterudites RFe_(4)Sb_(12) (R = Ca, Sr, Ba, La, Ce, Pr, Nd, Eu, and Yb)

Qiu, P. F. and Yang, J. and Liu, R. H. and Shi, X. and Huang, X. Y. and Snyder, G. J. and Zhang, W. and Chen, L. D. (2011) High-temperature electrical and thermal transport properties of fully filled skutterudites RFe_(4)Sb_(12) (R = Ca, Sr, Ba, La, Ce, Pr, Nd, Eu, and Yb). Journal of Applied Physics, 109 (6). Art. No. 063713. ISSN 0021-8979. https://resolver.caltech.edu/CaltechAUTHORS:20110426-104923243

[img]
Preview
PDF - Published Version
See Usage Policy.

2170Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20110426-104923243

Abstract

Fully filled skutterudites RFe_(4)Sb_(12) (R = Ca, Sr, Ba, La, Ce, Pr, Nd, Eu, and Yb) have been prepared and the high-temperature electrical and thermal transport properties are investigated systematically. Lattice constants of RFe_(4)Sb_(12) increase almost linearly with increasing the ionic radii of the fillers, while the lattice expansion in filled structure is weakly influenced by the filler valence charge states. Using simple charge counting, the hole concentration in RFe_(4)Sb_(12) with divalent fillers (R = Ca, Sr, Ba, Eu, and Yb) is much higher than that in RFe4Sb12 with trivalent fillers (R = La, Ce, Pr, and Nd), resulting in relatively high electrical conductivity and low Seebeck coefficient. It is also found that RFe_(4)Sb_(12) filled skutterudites having similar filler valence charge states exhibit comparable electrical conductivity and Seebeck coefficient, and the behavior of the temperature dependence, thereby leading to comparable power factor values in the temperature range from 300 to 800 K. All RFe_(4)Sb_(12) samples possess low lattice thermal conductivity. The correlation between the lattice thermal resistivity WL and ionic radii of the fillers is discussed and a good relationship of W_L ~ (r_(cage)−r_(ion))^3 is observed in lanthanide metal filled skutterudites. CeFe_(4)Sb_(12), PrFe_(4)Sb_(12), and NdFe_(4)Sb_(12) show the highest thermoelectric figure of merit around 0.87 at 750 K among all the filled skutterudites studied in this work.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.3553842DOIUNSPECIFIED
http://link.aip.org/link/doi/10.1063/1.3553842PublisherUNSPECIFIED
Additional Information:© 2011 American Institute of Physics. Received 15 November 2010; accepted 5 January 2011; published online 23 March 2011. This work was partly supported by National Natural Science Foundation of China (Nos. 50802109, 50820145203, 50825205), and the Visiting Professor and Knowledge Innovation Programs of the Chinese Academy of Sciences (Contract No. KJCX2-YW-H20).
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China50802109
National Natural Science Foundation of China50820145203
National Natural Science Foundation of China50825205
Chinese Academy of Sciences Visiting Professor and Knowledge Innovation ProgramKJCX2-YW-H20
Subject Keywords:barium compounds; calcium compounds; cerium compounds; electrical conductivity; europium compounds; high-temperature effects; iron compounds; lanthanum compounds; lattice constants; neodymium compounds; praseodymium compounds; Seebeck effect; semiconductor materials; skutterudites; strontium compounds; thermal conductivity; ytterbium compounds
Issue or Number:6
Classification Code:PACS: 72.20.Pa; 66.70.-f; 72.80.Jc; 61.66.Fn
Record Number:CaltechAUTHORS:20110426-104923243
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110426-104923243
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23467
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:26 Apr 2011 18:33
Last Modified:03 Oct 2019 02:46

Repository Staff Only: item control page