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Development of Thermoelectric Module Based on Dense Ca3Co4O9 and Zn0.98Al0.02O Legs
Paolo Mele,Hiroyuki Kamei,Hiroyuki Yasumune,Kaname Matsumoto,Koji MIYAZAKI 대한금속·재료학회 2014 METALS AND MATERIALS International Vol.20 No.2
Ca3Co4O9 (p-type) and Zn0.98Al0.02O (n-type) pellets were prepared by conventional sintering (CS) and SparkPlasma sintering (SPS) starting from the oxides. The best p-type sample was SPS Ca3Co4O9 obtained frompre-sintered pellets, with electrical conductivity σ = 144 S/cm and Seebeck coefficient S = 172 μV/K at800 °C, while thermal conductivity κ = 2.00 W/m×K and figure of merit ZT = 0.23. The best n-type samplewas CS Zn0.98Al0.02O showing σ = 83 S/cm and S = -268 μV/K at 800 °C, while κ = 5.03 W/m×K andZT = 0.127. The output power of a module based on SPS Ca3Co4O9 and CS Zn0.98Al0.02O legs was 2.26 mW(with T = 500 °C, ΔT = 248 °C).