Title

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

Document Type

Article

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

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