Work

Modeling Temperature Gradient Evolution of CoSb3 Material for Thermoelectric Devices during Spark Plasma Sintering

Year: 2009

Type: article

Abstract: The temperature distribution and evolution of Mo/Ti/CoSb3 materials used as thermoelectric couples of devices during spark plasma sintering were simulated by finite element method, and the results agree well with the die interior temperature measured by thermocouple. The sample and punches have higher temperature in whole sintering process, the highest temperature region is existed in CoSb3 region, and the radial temperature gradient in CoSb3 region is obvious. It was confirmed by experiments that the temperature gradient in sample results in non-uniform microstructure and thermal conductivity difference. The temperature gradient increases with decreasing thermal conductivity and increasing electrical resistivity of CoSb3-based compound, from the point of view of the thermal conductivity and electrical resistivity, respectively, the optimization method of the combined mechanical property and thermoelectric property of CoSb3-based compound was proposed.

Source: MATERIALS TRANSACTIONS

DOI: 10.2320/matertrans.mra2008203

Authors: Yanhong Cai, Degang Zhao, Xueying Zhao, Lidong Chen, Wan Jiang, Pengcheng Zhai

Institutions: Chinese Academy of Sciences, Shanghai Institute of Ceramics, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Wuhan University of Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: Program of Shanghai Subject Chief Scientist, National Key Research and Development Program of China