Abstract
Thermoelectric properties of Sr-doped LaCoO3 system which includes both La1−xSrxCoO3 and La0.95−xSrx□0.05CoO3 containing the A-site vacancy were prepared by solid state reaction. The crystal phases of the samples were investigated by X-ray diffraction method. The electrical conductivity, Seebeck coefficient, and thermal conductivity were investigated, focusing the effect of A-site vacancy. Doping of Sr to LaCoO3 improved the electrical conductivity but decreased the seebeck coefficient and increased the thermal conductivity. A-site vacancy of La0.95−xSrx□0.05CoO3 system, in comparison with La1−xSrxCoO3 system, increased electrical conductivity, and decreased lattice thermal conductivity. As a result, it was found that the thermoelectric properties of La0.95−xSrx□0.05CoO3 containing the A-site vacancy showed the higher values than those of La1−xSrxCoO3. The introduction of A-site vacancy was effective on the improvement of thermoelectric property.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
