Thermoelectric Multiphase Ceramics Based on Layered Calcium Cobaltite, as Synthesized Using Two-Stage Sintering
| Autor: | O. N. Karpov, E. A. Chizhova, E. A. Tugova, M. V. Tomkovich, Andrei Klyndyuk, R. S. Latypov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Electromotive force Analytical chemistry Sintering 010403 inorganic & nuclear chemistry Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences Cobaltite chemistry.chemical_compound chemistry Phase (matter) visual_art 0103 physical sciences Thermoelectric effect Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Cobalt oxide |
| Zdroj: | Glass Physics and Chemistry. 46:562-569 |
| ISSN: | 1608-313X 1087-6596 |
| Popis: | Multiphase ceramics are synthesized based on layered calcium cobaltite with a different cobalt oxide content by solid state synthesis followed by two-stage sintering. The phase composition is established, and the microstructure, electrical conductivity, and thermal electromotive force are investigated. The effect that the cation and phase compositions of ceramics have on its carrier transport properties and thermoelectric properties is established. The highest value for the power factor P is observed for multiphase ceramics with the composition Ca3Co3.4O9 + δ (0.7Ca3Co4O9 + δ + 0.3Ca3Co2O6), which is 265 μW/(m K2) at a temperature of 1100 K. This value is 20% higher than that for the Ca3Co4O9 + δ sample (P1100 = 218 μW/(m K2)) and exceeds the power factor value for low-density Ca3Co4O9 + δ ceramics prepared by the conventional solid state synthesis by a factor of 2.65. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink