Compressibility and Thermoelectric Behavior of TiCoSb Half-Heusler Compound at High Pressures

Authors

Jason L. Baker, University of Nevada, Las VegasFollow
Ravhi S. Kumar, University of Nevada, Las VegasFollow
Changyong Park, Carnegie Institution for ScienceFollow
Nenad Velisavljevic, Los Alamos National LaboratoryFollow
Andrew Cornelius, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

2-20-2018

Publication Title

Intermetallics

Volume

95

First page number:

137

Last page number:

143

Abstract

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.

Keywords

High-pressure; Equation of state; Thermoelectric material; Half-Heusler; Seebeck coefficient

Disciplines

Astrophysics and Astronomy

Repository Citation

Baker, J. L., Kumar, R. S., Park, C., Velisavljevic, N., Cornelius, A. (2018). Compressibility and Thermoelectric Behavior of TiCoSb Half-Heusler Compound at High Pressures. Intermetallics, 95 137-143.
http://dx.doi.org/10.1016/j.intermet.2018.02.006