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  Long-Term Stability of (Ti/Zr/Hf)CoSb1−xSnx Thermoelectric p-Type Half-Heusler Compounds Upon Thermal Cycling

Rausch, E., Balke, B., Ouardi, S., & Felser, C. (2015). Long-Term Stability of (Ti/Zr/Hf)CoSb1−xSnx Thermoelectric p-Type Half-Heusler Compounds Upon Thermal Cycling. Energy Technology, 3(12), 1217-1224. doi:10.1002/ente.201500183.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-3A26-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-1852-8
Genre: Journal Article

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 Creators:
Rausch, Elisabeth1, Author              
Balke, Benjamin, Author
Ouardi, Siham2, Author              
Felser, Claudia3, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: energy conversion, half-Heusler compounds, semiconductors, thermal stability, thermoelectrics
 Abstract: The effect of thermal cycling upon the thermoelectric performance of state-of-the-art p-type half-Heusler materials was investigated and correlated with the impact on the structural properties. We simulated a heat treatment of the material similar to actual applications in the mid-temperature range, such as occurs during the energy conversion from an automotive exhaust pipe. We compared three different compositions based on the (Ti/Zr/Hf)CoSb1−xSnx system. The best and most reliable performance was achieved using Ti0.5Hf0.5CoSb0.85Sn0.15, which reached a maximum figure of merit ZT of 1.1 at 700 °C. The intrinsic phase separation and resulting microstructuring, which are responsible for the outstanding thermoelectric performance, were stable even after 500 heating and cooling cycles. The standard deviation of the obtained ZT values lies within 2–3 , which is significantly smaller than the measurement errors.

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Language(s): eng - English
 Dates: 2015-11-012015-11-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1002/ente.201500183
BibTex Citekey: 2198:ENTE201500183
 Degree: -

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Title: Energy Technology
Source Genre: Journal
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Publ. Info: WILEY-VCH Verlag
Pages: - Volume / Issue: 3 (12) Sequence Number: - Start / End Page: 1217 - 1224 Identifier: ISSN: 2194-4296