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المؤلفJaldurgam, Farheen Fathima
المؤلفAhmad, Zubair
المؤلفTouati, Farid
تاريخ الإتاحة2021-10-18T06:52:17Z
تاريخ النشر2021
اسم المنشورQatar University Annual Research Forum and Exhibition (QUARFE 2021)
الاقتباسJaldurgam F. F., Ahmad Z., Touati F., "Optimum sintering method and temperature for cold compact Bismuth Telluride pellets for thermoelectric applications", Qatar University Annual Research Forum and Exhibition (QUARFE 2021), Doha, 20 October 2021, https://doi.org/10.29117/quarfe.2021.0053
معرّف المصادر الموحدhttps://doi.org/10.29117/quarfe.2021.0053
معرّف المصادر الموحدhttp://hdl.handle.net/10576/24320
الملخصThis work intends to investigate the optimum sintering method and temperature that can improve the efficiency of bismuth telluride cold compact pellets for thermoelectric applications. Different p-type and n-type bismuth telluride cold compact pellets were treated using three different sintering techniques and conditions: pressure less (conventional), microwave, and tube (using argon environment) at temperatures 250°C, 300°C, 350°C, and 400°C. The structural, microscopic, electron transport, thermal, and dielectric properties of the pristine and sintered samples were examined. Broadband dielectric spectroscopy was performed to extract a detailed picture of the dielectric properties of the samples. Even though each type of sintering had its own merits and demerits, the optimum conditions for enhanced electric and thermal features were found in microwave furnaces followed by tube and conventional. Low thermal conductivity of 0.4 W/m/K was observed in the samples sintered at 250 °C while the increase in sintering temperature from 250°C to 300°C improved the crystallinity of the material. Moreover, the crystal structure of the bismuth telluride altered with the occurrence of higher oxidation leading to the formation of high bismuth telluride oxide phases at sintering temperatures above 300°C, more dominantly in the n-type samples.
اللغةen
الناشرQatar University Press
الموضوعThermoelectric
Bismuth telluride
Broadband Dielectric Spectroscopy
Sintering
العنوانOptimum sintering method and temperature for cold compact Bismuth Telluride pellets for thermoelectric applications
النوعPoster
dc.accessType Open Access


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