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AuthorFarheen F., Jaldurgam
AuthorAhmad, Zubair
AuthorTouati, Farid
AuthorAshraf, Abdullah Al
AuthorBhadra, Jolly
AuthorAltahtamouni, Talal
AuthorAl-Thani, Noora J.
Available date2023-01-15T05:12:49Z
Publication Date2022-06-30
Publication NameMaterials Today Communications
Identifierhttp://dx.doi.org/10.1016/j.mtcomm.2022.103345
CitationJaldurgam, F. F., Ahmad, Z., Touati, F., Al Ashraf, A., Bhadra, J., Altahtamouni, T., & Al-Thani, N. J. (2022). Thermal and mechanical stability of microwave sintered cold compact bismuth telluride thermoelectric material. Materials Today Communications, 31, 103345.
ISSN23524928
URIhttps://www.sciencedirect.com/science/article/pii/S2352492822002161
URIhttp://hdl.handle.net/10576/38320
AbstractBoth p-type and n-type bismuth telluride (Bi2Te3)-based thermoelectric materials demonstrate high thermoelectric efficiency in the low-temperature thermoelectric modules, but their constrained thermal and mechanical stability restrict their commercial applications. In our current work, we report the thermal and mechanical properties of both p-type and n-type bismuth telluride-based thermoelectric materials prepared by the cold compaction method. The compacted pellets were sintered in a microwave at 250 °C and 300 °C. Thermogravimetric analysis (TGA), and differential scanning calorimeter (DSC) analysis were performed to study the thermal stability, and nanoindentation, compression test, and microhardness tests were done for mechanical stability. The TGA-DSC results indicate a slight mass gain at 350 °C followed by a steep weight loss beyond 550 °C suggesting good thermal stability when the experimental temperature is below 350 °C. The hardness values decreased with an increase in the sintering temperature. The compression strength for all the samples had almost a constant value of 64 ± 0.5 MPa. Our fabrication method has the benefits of a low-cost, simple, and quick process paired with better thermal and mechanical properties, making it a good prospect for bismuth telluride thermoelectrics.
SponsorThis work is supported by Qatar University Internal Grant No. QUCG-CAM-2020\21–1. The findings achieved herein are solely the responsibility of the authors. We would like to acknowledge Central Laboratory Unit (CLU), Qatar University, 2713, Doha, Qatar for accomplishing the Differential Scanning Calorimeter (DSC), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM) analysis.
Languageen
PublisherElsevier
SubjectBismuth telluride
Thermoelectric
Microwave sintering
Thermal properties
Mechanical properties
TitleThermal and mechanical stability of microwave sintered cold compact bismuth telluride thermoelectric material
TypeArticle
Volume Number31
dc.accessType Full Text


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