Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures

We have performed high-pressure structural, electrical, and thermal property measurements on half-Heusler thermoelectric compound, TiCoSb. High-pressure powder diffraction measurements have been performed in an angle-dispersive geometry using synchrotron x-rays up to 115 GPa using a diamond anvil ce...

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Bibliographic Details
Published inIntermetallics Vol. 95; no. C
Main Authors Baker, Jason L., Kumar, Ravhi S., Park, Changyong, Velisavljevic, Nenad, Cornelius, Andrew
Format Journal Article
LanguageEnglish
Published United States Elsevier 01.04.2018
Subjects
Equation of state
half-Heusler
High-pressure
MATERIALS SCIENCE
Seebeck coefficient
thermoelectric material
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Summary:We have performed high-pressure structural, electrical, and thermal property measurements on half-Heusler thermoelectric compound, TiCoSb. High-pressure powder diffraction measurements have been performed in an angle-dispersive geometry using synchrotron x-rays up to 115 GPa using a diamond anvil cell. The results show the cubic crystal structure (F-43m) stable and no pressure induced structural phase transitions were observed over the entire pressure range. The electrical and thermal properties were studied up to 5 GPa using a Paris-Edinburgh press equipped with a specialized sample cell assembly. The compressibility, variation of thermal conductivity, Seebeck co-efficient and thermoelectric figure of merit (ZT) for the material are discussed in detail.
Bibliography:89233218CNA000001; NA0001982; NA0001974; AC02-06CH11357; FG02-99ER45775
LA-UR-17-28921
USDOE National Nuclear Security Administration (NNSA)
ISSN:0966-9795
1879-0216