The thermoelectric properties of Ca 1¹x Bi x MnO 3¹¤ sintered bodies prepared by the electrostatic spray deposition method and sintering technology were evaluated. ) at 300 K. The increase in carrier concentration contributed to higher conductivity, power factor and power generation density in the Bi-substituted compound. In thermoelectric performance evaluations, the power density reached 625 mW·cm ¹2 for Ca 0.95 Bi 0.05 MnO 3¹¤ with a temperature difference of 444 K, an 11-fold increase compared to the parent compound CaMnO 3¹¤ (57 mW·cm
¹2).
We established a Ca1-xBixMn1-yNiyO3 (0 ≤ x, y ≤ 0.1) powder library using a combinatorial system based on the electrostatic spray deposition method. Single phase perovskite-type structures were identified in all of the powders. To measure electrical conductivity, the powder library was subjected to high-pressure (200 MPa) and heat-treated at 950°C for 1 hour in an oxygen atmosphere. As a representative example, the electrical conductivity of 5%-Bi-substituted CaMnO3-δ showed a higher value (63 S·cm-1) than an unsubstituted powder (13 S·cm-1). The improved electrical conductivity, on the other hand, was still very far from the ideal result (167 S·cm-1).
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