Ultra low thermal conductivity of disordered layered p-type bismuth telluride

Grasso, Salvatore, Tsujii, Naohito, Jiang, Qinghui, Khaliq, Jibran, Maruyama, Satofumi, Miranda, Miriam, Simpson, Kevin, Mori, Takao and Reece, Michael (2013) Ultra low thermal conductivity of disordered layered p-type bismuth telluride. Journal of Material Chemistry C, 1. pp. 2362-2367. ISSN 2050-7526

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Official URL: http://dx.doi.org/10.1039/C3TC30152D

Abstract

Disordered layered p-type bismuth telluride was obtained by high pressure (1 GPa) and high strain deformation along the c-axis direction of commercially available single crystals. After initial deformation the p-type bismuth telluride flakes were subsequently fully densified by cold pressing (800 MPa at room temperature). As a result of the severe plastic deformation, the samples showed highly anisotropic electrical and thermal conductivities. In particular, the thermal conductivity measured along the pressing direction was as low as 0.34 W m-1 K-1, which is one of the lowest values reported for fully dense p-type bismuth telluride. The full set of thermoelectric properties of the disordered bismuth antimony telluride is critically discussed.

Item Type: Article
Subjects: F100 Chemistry
F200 Materials Science
F300 Physics
H300 Mechanical Engineering
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Jibran Khaliq
Date Deposited: 25 Sep 2017 09:56
Last Modified: 25 Sep 2017 09:56
URI: http://nrl.northumbria.ac.uk/id/eprint/31947

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