Title :
Thermoelectric Properties of SnzCo4Sb12-yTey Skutterudites
Author :
Mallik, Ramesh Chandra ; Jung, Jae-Yong ; Das, V. Damodara ; Ur, Soon-Chul ; Kim, Il-Ho
Author_Institution :
Res. Center for Sustainable ECo-Devices & Mater., Chungju Nat. Univ., Chungbuk
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
Keywords :
cobalt compounds; electrical conductivity; heat treatment; melting; thermal conductivity; thermoelectricity; tin compounds; 300 to 700 K; SnCo4Sb12Te; doping; electrical conductivity; encapsulated induction melting; filling; heat treatment; phonon scattering; skutterudites; thermal conductivity; thermoelectricity; Doping; Electrons; Filling; Heat treatment; Phonons; Scattering; Tellurium; Thermal conductivity; Thermoelectricity; Tin;
Conference_Titel :
Thermoelectrics, 2006. ICT '06. 25th International Conference on
Conference_Location :
Vienna
Print_ISBN :
1-4244-0811-3
Electronic_ISBN :
1094-2734
DOI :
10.1109/ICT.2006.331307
