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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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:	Dr Jibran Khaliq
Date Deposited:	25 Sep 2017 09:56
Last Modified:	12 Oct 2019 20:41
URI:	http://nrl.northumbria.ac.uk/id/eprint/31947

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