Thermoelectric properties of n-type Ca 1x Dy x Mn 1-y Nb y O 3-δ compounds ( x = 0 , 0 . 02 , 0 . 1 and y = 0 , 0 . 02 ) prepared by spray-drying method

We report the high temperature thermoelectric properties of Ca1-xDyxMn1-yNbyO3-δ (x = 0, 0.02, 0.1 and y = 0, 0.02 ) synthesized by spray-drying method. A maximum power factor (PF) value of 2.65 μW K -2 cm -1 is obtained at 1100 K for CaMn0.98Nb0.02O3-δ. This represents an improvement of about 75% with respect to undoped CaMnO3-δ sample at the same temperature. We also provide a complete structural characterization of the samples.