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

Abstract:

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The n-type thermoelectric materials of Bi2Te2.7Se0.3 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 Bi2Te2.7Se0.3 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.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

905-908

DOI:

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

Citation:

D. C. Cho et al., "Effect of Oxygen Content on Thermoelectric Properties of Sintered Bi-Te Based Compounds ", Materials Science Forum, Vols. 449-452, pp. 905-908, 2004

Online since:

March 2004

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$35.00

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