Thermoelectric Properties and Power Generation of p-Ca_3Co_4O_9 and n-Sr_(0.87)La_(0.13)TiO_3 Thermoelectric Modules

摘要

The Ca_3Co_4O_9 (CCO) and Sr_(0.87)La_(0.13)TiO_3 (SLTO) are good property of oxide thermoelectric (TE) materials. They synthesized by solid state reaction (SSR) method to study thermoelectric properties and fabrication of thermoelectric module. It was found that, synthesis of CCO shows that Seebeck coefficient, electrical resistivity, thermal conductivity and ZT values are 130 μV K~(-1), 8.31 mΩ cm, 0.82 W m~(-1) K~(-1) and 0.08, respectively at 473 K. The Seebeck coefficient, electrical resistivity, thermal conductivity and ZT values of SLTO are -359 μV K~(-1), 2.9 mΩ m, 18.09 W m~(-1) K~(-1) and 1.13×l0~(-3), respectively at473 K. TE modules of CCO and SLTO were fabricated by ultra sonic soldering method. The power generation of TE modules were measured with temperature difference (ΔT) of 10-180 K. The 1 pair and 2 pairs TE modules for a maximum power generation of matching load are 19 kΩ and 30 kΩ, respectively. The maximum output power of 2 pairs TE module is larger than 1 pair TE module about two times.