Showing papers by "V. Damodara Das published in 2006"
01 Aug 2006
TL;DR: In this paper, a single delta-phase was obtained by the subsequent heat treatment at 823 K for 6 days, indicating that Te atoms substituting for Sb atoms acted as electron donors.
Abstract: Sn-filled and Te-doped CoSb3 skutterudites (Snz Co4Sb12-yTey) were synthesized by encapsulated induction melting, and their thermoelectric properties were investigated from 300 K to 700 K. Single delta-phase was successfully obtained by the subsequent heat treatment at 823 K for 6 days. Intrinsic CoSb3 showed n-type conductivity from 300 K to 400 K and there is a transition to p-type conductivity above 400 K. Sn-filled Sn zCo4Sb12 showed p-type conductivity and Sn-filled/Te-doped SnzCo4Sb12-yTey showed n-type conductivity from 300 K to 700 K, indicating that Te atoms substituting for Sb atoms acted as electron donors. Thermal conductivity was considerably reduced by filling and doping due to the phonon scattering. Sn filling effect and Te doping effect are examined and compared in this study
1 citations