caa a22 4500 378903691 CHVBK 20180305123524.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.500 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.500 Application of dynamic mechanical analysis techniques to bismuth telluride based thermoelectric materials [Elektronische Daten] [Witold Brostow, Kevin P. Menard, John B. White] Dynamic mechanical analysis (DMA) techniques are commonly applied to characterize polymer-based materials - but little if at all to characterize semiconductor thermoelectric (TE) materials. TE materials may be coupled with polymeric materials in advanced thermoelectric devices, and the knowledge of TE material properties will be useful in the choice of materials for future applications. We have obtained DMA results for both n-type and p-type bismuth telluride based TE materials. We find that tan δ values, indicative of viscoelastic energy dissipation modes, approach the values for glassy or semi-crystalline polymers, and are larger by more than a whole order of magnitude than the tan δ of structural metals. DMA thermal scans show clear hysteresis-type effects and a correlation with differential scanning calorimetry thermal transitions. DMA properties as a function of frequency are briefly discussed. Our results show that DMA techniques are useful in the evaluation of thermophysical and thermomechanical properties of these TE materials and of assembled coolers. The viscoelastic effects we report may provide a damping mechanism for severe stresses inherent to service conditions of the TE coolers. © 2013 by Walter de Gruyter GmbH & Co. Brostow Witold Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut Menard Kevin P. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut White John B. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut e-Polymers De Gruyter 4/1(2004-12-01), 500-512 2197-4586 4:1<500 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.500 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.500 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Brostow Witold Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut NATIONALLICENCE 700 1- Menard Kevin P. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut NATIONALLICENCE 700 1- White John B. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, P.O. Box 305310, Denton, TX 76203-5310, USA; Fax 940.565.4824 aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 500-512 2197-4586 4:1<500 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter