|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
||Novel Synthesis and Optimization of Half-Heusler Materials for Thermoelectric Applications
||Brian J. Jaques, Samuel Pedersen, Joseph R Croteau, Addrianna Lupercio, Robert Bellomy, Nick Kempf, Matthew Lawson, Lan Li, Yanliang Zhang, Darryl P. Butt
|On-Site Speaker (Planned)
Half-Heusler materials have gained momentum in the recent years for thermoelectric device applications. If the price per watt of produced electricity can be lowered, either by improving their conversion efficiency or eliminating expensive elements like Hf, widespread commercialization of these materials could be realized. In the work presented, a rapid mechanical synthesis route is used to produce single phase nano-powders. By improving phase purity and reducing grain size, we have demonstrated simultaneous improvement in Seebeck coefficient, electrical conductivity, and thermal conductivity, which has led to a 75% increase in the previously-reported, highest figure of merit for an n-type NbCoSn based half-Heusler. We have also performed density functional theory-based thermodynamic calculations to verify the compound stability and combined with Boltzmann transport theory to estimate thermoelectric parameters.
||Planned: Supplemental Proceedings volume