Thermoelectric Properties of BaxCo4Sb12 Prepared by High Pressure and High Temperature

Polycrystalline filled Skutterudite compounds BaxCo4Sb12 (0-x-0.5) are synthesized by high pressure and high temperature （HPHT） technique. The thermal conductivity for CoSb3 is depressed significantly by Ba-filling combined HPHT technique. The value of 1.25 Wm-1 K-1 for Ba0.372Co4Sb12 is obtained at 633K. The dimensionless thermoelectric figure of merit ZT, increases with temperature increasing and reaches a maximal value of 1.01 at 663 K.