The effect of Mo concentration on the electrical properties of CaV1-xMoxO3-δ (x=0.2 ÷ 0.6) anode materials for solid oxide fuel cells
| Autor: | S.N. Shkerin, S.A. Belyakov, M.S. Plekhanov, D.G. Kellerman |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Annealing (metallurgy) Mechanical Engineering TEC Analytical chemistry Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Thermal expansion 0104 chemical sciences Anode chemistry.chemical_compound chemistry Mechanics of Materials Electrical resistivity and conductivity Seebeck coefficient General Materials Science 0210 nano-technology |
| Zdroj: | Materials Research Bulletin. 129:110904 |
| ISSN: | 0025-5408 |
| Popis: | A perovskite-like CaV1-xMoxO3-δ (x = 0.2 ÷ 0.6) were prepared by a formate solution method with the final annealing at 1473 K in an H2 atmosphere. X-ray diffraction analysis was used for sample characterisation. Metal-like electric conductivity was observed using a 4-probe DC technique from 573 to 1123 K in dry H2. Magnetic susceptibility measurements showed the absence of localised V and Mo valence electrons. The Seebeck coefficient was measured between temperatures of 573–1123 K in dry H2, supporting the hypothesis that electronic conductivity is predominant. Thermal expansion coefficients (TEC) are obtained by dilatometry from 373 to 1123 K in dry H2. TEC values increase with temperature from 10 ppm to 15 ppm K−1 and decrease with Mo concentration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect