Journal of Investigations on Engineering & Technology, cilt.2, ss.30-33, 2019 (Hakemli Üniversite Dergisi)
This study will address the main themes of today, such as reliability, sustainable and clean energy. Within this objective, Bi2Sr2-xRbxCo2Oy materials with x=0.0, 0.025, 0.050, 0.075, 0.100 and 0.125 have been fabricated as powder by solid-state technique. From the resistivity graphic, we can reach that pure and 0.025 Rb samples exhibit a semiconducting-like behavior (dρ/dt<0) and the other samples exhibit a metallic-like behavior (dρ/dt>0). The Seebeck coefficients of all samples are determined as positive values for all temperature ranges evidencing the conduction mechanism mainly governed by holes. The maximum power factor values have been obtained in Rb=0.10 sample as 0.19 Mw/K2 at around 650 0C.