Thermoelectric properties of the solid solutions BaPb sub(1-x)Sb sub(x)O sub(3) (x = 0-0.4)

Thermoelectric properties of the solid solutions BaPb sub(1-x)Sb sub(x)O sub(3) with x = 0.00-0.40 were investigated in the temperature range 373-1073 K. The materials with x = 0.00-0.15 showed semi-metallic behavior. The doping with Sb atoms brought about the increase in the Fermi level. For the materials with x = 0.25 and 0.40, the valence band was fully occupied and the conduction band was partially occupied, but the electrical conductivity data suggest that the carriers behave like large-polarons due to the distortion of the PbO sub(6) octahedra. The thermoelectric power factors were estimated to be 1-2 x 10 super(-5)Wm super(-1)K super(-2) for x = 0.00-0.15. copyright 2002 Elsevier Science Ltd. All rights reserved.