Thermoelectric properties of Cu1−xPtxFeO2 (0.0 ≤ x ≤ 0.05) delafossite-type transition oxide

The samples of Cu1−xPtxFeO2 (0 ≤ x ≤ 0.05) delafossite were synthesized by solid state reaction method for studying thermoelectric properties. The properties of Seebeck coefficient, electrical conductivity and thermal conductivity were measured in the high temperature ranging from 300 to 960 K. The results of Seebeck coefficient, electrical conductivity and power factor were increased with increasing Pt substitution and temperature. The thermal conductivity was decreased from 5.8 to 3.5 W/mK with increasing the temperature from 300 to 960 K. An important results, the highest value of power factor and ZT is 2.0 × 10−4 W/mK2 and 0.05, respectively, for x = 0.05 at 960 K.

Research highlights
► New compounds Cu1−xPtxFeO2 (0.0 ≤ x ≤ 0.05) form single crystal phase of delafossite structure.
► The Cu1−xPtxFeO2 delafossite shows high electric conductivity and its value increases dependent on increasing Pt substitution.
► The thermal conductivity of Cu1−xPtxFeO2 samples has lowest value and small changes with content of Pt substitution.