|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||Enhanced Thermoelectric Figure of Merit in Bi-Sb-Te based Composites with Dispersed ZrO2 Nanoparticles
||Babu Madavali, Chul-Hee Lee, Hyo-Seob Kim, Kap-Ho Lee, Soon-Jik Hong
|On-Site Speaker (Planned)
Thermoelectric generators (TEGs) are much fascinating devices in recent years due to their high potential in waste heat recovery and energy harvesting applications. In this research, p-type BiSbTe/(x-wt%)ZrO<SUB>2</SUB>(2, 4, and 6) nanocomposites (NC) were fabricated by ball milling, and spark plasma sintering. The phase and existence of ZrO<SUB>2</SUB>nano-inclusions was confirmed by x-ray diffraction and TEM-SAED analysis. The Seebeck coefficient was significantly improved, whereas the total thermal conductivity was considerably decreased for the NCs due to the scattering of carriers at newly formed BiSbTe/ZrO<SUB>2</SUB> interfaces. The thermoelectric transport properties indicate that the nanocomposite structures improve the thermoelectric figure of merit of 1.34 for the 2 wt% added BiSbTe/ZrO<SUB>2</SUB> nanocomposite bulks. The hardness of the nanocomposites was significantly improved (≥ 27%) compared to that of pure BiSbTe, and this was attributed to grain-boundary hardening and to a dispersion strengthening mechanism.
||Planned: Supplemental Proceedings volume