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Effect of TeI4 Content on Thermoelectric Properties of N-Type Bi2(Te,Se)3 Materials Prepared by Spark Plasma Sintering

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Abstract:

The n-type Bi2(Te,Se)3 thermoelectric materials doped with different contents of TeI4 were fabricated through the spark plasma sintering (SPS) technique at 693K under a pressure of 60MPa. The sintered materials were rather dense and showed preferred grain orientation. Electrical conductivity (s), Seebeck coefficient (a), and thermal conductivity (k) were measured in the temperature range of 300-500K. The optimal figure of merit ZT (ZT=a2sT/k) of the sintered material in the direction perpendicular to the pressing direction showed a value of 0.75 for the sample containing 0.14wt% TeI4.

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

393-396

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.393

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Online since:

February 2007

Authors:

Jun Jiang, Li Dong Chen, Sheng Qiang Bai, Qin Yao, Qun Wang

Keywords:

Bi2(Te,Se)3, Spark Plasma Sintering (SPS), Thermoelectric Property

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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