Fabrication and Thermoelectric Properties of N-Type Bi2Te3 Based Compounds by Spark Plasma Sintering

D.M. Lee; Cheol Ho Lim; Dong Choul Cho; Seung Y. Shin; Won Seung Cho

doi:10.4028/www.scientific.net/MSF.486-487.253

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HomeMaterials Science ForumMaterials Science Forum Vols. 486-487Fabrication and Thermoelectric Properties of...

Fabrication and Thermoelectric Properties of N-Type Bi₂Te₃ Based Compounds by Spark Plasma Sintering

Abstract:

N-type Bi2Te3 based thermoelectric compound was prepared by spark plasma sintering with a temperature range of 340~460°C and powder size of ~75㎛, 76~150㎛, 151~250㎛. Thermoelectric properties of the compound were measured as a function of the sintering temperature and powder size. With increasing sintering temperature, the electrical resistivity and thermal conductivity of the compound greatly changed because of the increase in relative density. The Seebeck coefficient and electrical resistivity were varied largely with increasing powder size. Therefore, the compound sintered at 460°C, with the powder of ~75㎛, showed a figure of merit of 2.44 x 10-3/K. Also, the bending strength was 75MPa.

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Materials Science Forum (Volumes 486-487)

Pages:

253-256

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.486-487.253

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Online since:

June 2005

Authors:

D.M. Lee, Cheol Ho Lim, Dong Choul Cho, Seung Y. Shin, Won Seung Cho

Keywords:

Bi₂Te₃, Peltier Effect, Seebeck Effect, Spark Plasma Sintering (SPS), Thermoelectric

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