Effect of Oxygen Content on Thermoelectric Properties of Sintered Bi-Te Based Compounds

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

doi:10.4028/www.scientific.net/MSF.449-452.905

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HomeMaterials Science ForumMaterials Science Forum Vols. 449-452Effect of Oxygen Content on Thermoelectric...

Effect of Oxygen Content on Thermoelectric Properties of Sintered Bi-Te Based Compounds

Abstract:

The n-type thermoelectric materials of Bi₂Te_2.7Se_0.3 doped with SbI3 were prepared by spark plasma sintering technique. The powders were ball-milled in an argon and air atmosphere. Then, powders were reduced in H2 atmosphere. Effects of oxygen content on the thermoelectric properties of Bi₂Te_2.7Se_0.3 compounds have been investigated. Seebeck coefficient, electrical resistivity and thermal conductivity of the sintered compound were measured at room temperature. It was found that the effect of atmosphere during the powder production was remarkable and thermoelectric properties of sintered compound were remarkably improved by H2 reduction of starting powder. The obtained maximum figure of merit was 2.4 x 10^-3/K.

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Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

905-908

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.905

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Online since:

March 2004

Authors:

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

Keywords:

Bi₂Te₃, Reduction, Seebeck Coefficient, Spark Plasma Sintering (SPS), Thermoelectric

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