Fabrication of an all-oxide thermoelectric power generator

An oxide thermoelectric device was fabricated using Gd-doped Ca3Co4O9 p-type legs and La-doped CaMnO3 n-type legs on a fin. The power factors of p legs and n legs were 4.8 x 10-4Wm-1K-2 and 2.2x10-4Wm-1K-2 at 700 degree C in air, respectively. With eight p - n couples the device generated an output power of 63.5 mW under the thermal condition of hot side temperature Th=773 degreeC and a temperature difference ΔT=390 degreeC. This device proved to be operable for more than two weeks in air showing high durability. [copyright] 2001 American Institute of Physics