Thermoelectric properties of solution combustion synthesized calcium cobalt oxides

摘要

Textured Ca_3Co_4O_9 was regarded as one of potential thermoelectric (TE) oxides applied in intermediate and high temperature. In this study, Ca_3Co_4O_9 and Bi-doped Ca_3Co_4O_9 were synthesized by solution combustion synthesis (SCS) using urea and citric acid as fuel and sintered by spark plasma sintering (SPS), and the TE properties were evaluated from different measuring directions.