Polymer-mixed Sb₂Te₃/Te nanocomposites exhibiting p-type to n-type conduction reversal and thermal conductivity reduction Article Swipe

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Materials science Thermal conductivity Nanocomposite Thermoelectric effect Crystallite Thermoelectric materials Microstructure Composite material Polymer Conductivity Thermal conduction Metallurgy Chemistry Thermodynamics Physics Physical chemistry

Dilip Kumar Meena , Rapaka S. C. Bose , A.M. Umarji , D. Arvindha Babu ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.1088/2053-1591/ace30b · OA: W4382600201

Sb 2 Te 3 -based materials are potential room-temperature thermoelectric materials. In the present work, we choose polycrystalline Sb 2 Te 3 /Te nanocomposites and utilize Poly Methyl Methacrylate (PMMA) to reduce the thermal conductivity of Sb 2 Te 3 samples. PMMA and polycrystalline Sb 2 Te 3 /Te were well mixed using ball milling. Pellets have been made by the cold press method. Thermoelectric transport properties of Sb 2 Te 3 /Te nanocomposites: composition, microstructure, and analysis are found to be influenced by PMMA. With increasing PMMA concentration a p-type to n-type transition has been observed because there are fewer charge carriers or the composites have a higher resistance. It is also observed that the thermal conductivity of Sb 2 Te 3 /Te nanocomposites decreases as the PMMA increases. This research paves the way for making the best thermoelectric materials by reducing thermal conductivity through the use of polymers.