Thermoelectric properties of perovskite type strontium ruthenium oxide

Polycrystalline samples of perovskite type strontium ruthenium oxide, SrRuO3 have been prepared and the thermoelectric properties viz., the electrical resistivity, Seebeck coefficient, and thermal conductivity have been evaluated from room temperature to about 1000 K. The electrical resistivity of SrRuO3 is about the same as that of state-of-the-art thermoelectric materials, and shows a positive temperature dependence. The Seebeck coefficient of SrRuO3 equals 36 μV K−1 at room temperature. The thermal conductivity of SrRuO3 at room temperature equals 6.0 W m−1 K−1, which is high compared with that of state-of-the-art thermoelectric materials. The maximum value of the thermoelectric figure of merit ZT is 0.03 at around 670 K.