WESC 2022, İstanbul, Turkey, 18 - 21 December 2022, pp.9-11
This work addresses the main themes of today, such as reliable, sustainable and clean energy. Within this objective,
Ca1-x(Na0.5Y0.5)xMnO3 (x = 0.0, 0.05, 0.10, 0.15 and 0.20) thermoelectric materials have been produced by solid state
reaction technique. X-Ray diffraction analysis has been revealed similar patterns corresponding to the thermoelectric
phase for all sintered samples. From FESEM, it seems that grain sizes decrease and the porosity increases in general
by co-doping of Na and Y. Electrical resistivity values of all Na and Y containing samples are smaller than the pure one.
The Seebeck coefficient values of all samples are negative for all temperature ranges confirming the conduction
mechanism mainly governed by electrons. The maximum power factor value is obtained in x=0.05 Na and Y containing
sample as 0.25 mw/K2m at around 800°C.