Application of Thermomechanical Characterization Techniques to Bismuth Telluride Based Thermoelectric Materials

The thermoelectric properties of bismuth telluride based thermoelectric (TE) materials are well-characterized, but comparatively little has been published on the thermomechanical properties. In this paper, dynamic mechanical analysis (DMA) and differential scanning calorimetry data for bismuth telluride based TE materials is presented. The TE materials' tan delta values, indicative of viscoelastic energy dissipation modes, approached that of glassy or crystalline polymers, were greater than ten times the tan delta of structural metals, and reflected the anisotropic nature of TE materials. DMA thermal scans showed changes in mechanical properties versus temperature with clear hysteresis effects. These results showed that the application of DMA techniques are useful for evaluation of thermophysical and thermomechanical properties of these TE materials.

Grantor dc:publisher

University of North Texas

Year dc:date

2002

Author dc:creator

• White, John B.

Contributors dc:contributor

• Brostow, Witold, 1934-
• Menard, Kevin P.
• Bouanani, Mohamed El
• Reidy, Richard

• Thermoelectric materials.
• Bismuth.
• Tellurides.
• DMA
• bismuth telluride
• modulus
• tan delta
• thermophysical

Statement dc:rights

• Use restricted to UNT Community
• Copyright
• White, John B.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 50949612
https://digital.library.unt.edu/ark:/67531/metadc3166/
ark: ark:/67531/metadc3166

OAI identifier oai:identifier

info:ark/67531/metadc3166