Preparation and thermoelectric properties of Bi₂Te₃/CoSb₃based graded material

J. Wang, X. F. Tang

State Key Laboratory of AdvancedTechnology for Materials Synthesis and Processing,

Wuhan University of Technology, Wuhan430070, China

In orderto achieve high performance of a thermoelectric device, one way is to improvethe operating temperature range of the thermoelectric materials. Largetemperature difference can be obtained through joining different kinds ofthermoelectric materials. In this paper, the preparation process of Bi₂Te₃/CoSb₃based graded thermoelectric materials was investigated by Spark PlasmaSintering (SPS). The microstructure of the interface of the Bi₂Te₃/CoSb₃graded material was studied as well as their thermoelectric transportproperties.