Examination of CeFe[subscript 4]Sb[subscript 12] upon exposure to air: Is this material appropriate for use in terrestrial, high-temperature thermoelectric devices?
The rare-earth (RE) filled skutterudites (e.g., CeFe{sub 4}Sb{sub 12}) have been proposed for use in the next-generation of high-temperature thermoelectric devices. In this investigation, the influence of air exposure on the stability of CeFe{sub 4}Sb{sub 12} has been studied for temperatures ranging from 300 K to 1073 K. Examination of the material after exposure to air at these temperatures using thermogravimetric analysis, powder X-ray diffraction, and X-ray absorption near-edge spectroscopy has shown that above 573 K, CeFe{sub 4}Sb{sub 12} decomposes and then rapidly oxidizes. This temperature is much lower than the maximum operating temperature proposed for high-temperature thermoelectric devices used to recover the waste heat from vehicle exhaust systems (700-773 K).
- Research Organization:
- Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1002572
- Journal Information:
- J. Alloy Comp., Journal Name: J. Alloy Comp. Journal Issue: (1) ; 08, 2010 Vol. 505; ISSN 0925-8388; ISSN JALCEU
- Country of Publication:
- United States
- Language:
- ENGLISH
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