|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||Enhanced Thermoelectric Properties of Sb2Te3 Nanoplates Incorporated Bi0.5Sb1.5Te3 Composites
||Peyala Dharmaiah, Chul Hee Lee, Dongwon Shin, Jar-Myung Koo, Soon-Jik Hong
|On-Site Speaker (Planned)
In this work, Sb2Te3 nanoplates incorporated in Bi0.5Sb1.5Te3 (BST) matrix were prepared by mixing various ratios ( BST/xSb2Te3, x=0, 12 and 20 wt%) using low energy ball milling and spark plasma sintering, and their thermoelectric properties were investigated. The existences of nanoplates in the matrix were investigated using SEM analysis. The results indicate that the electrical conductivity significantly increased (38%) and less reduction in Seebeck coefficient with the addition of Sb2Te3 nanoplates due to the increased carrier concentration. Simultaneously, the thermal conductivity (κ) decreased with the addition of nanoplates, which is 9% lower than BST matrix owing to enhanced phonon scattering of nanoplates. As a result, the highest ZT value obtained was 1.28 at 350 K for the incorporation of 12wt% Sb2Te3 nanoplates in Bi0.5Sb1.5Te3 matrix. This result enables that the overall thermoelectric performance of BST composites can be effectively improved with the addition of Sb2Te3 nanoplates.
||Planned: Supplemental Proceedings volume