Improved ceramic and electrical properties of CaZrO3-based proton-conducting materials prepared by a new convenient combustion synthesis method
Auteur
Lyagaeva J., Danilov N., Korona D., Farlenkov A., Medvedev D., Demin A., Animitsa I., Tsiakaras P.Date
2017Language
en
Sujet
Résumé
The present work emphasizes the features of a new combustion synthesis method suitable for easy synthesis and sintering of CaZrO3-based materials as promising proton-conducting electrolytes for electrochemical applications in solid oxide electrochemical devices. Sc- and In-doped CaZrO3 compounds are selected to be the objects of investigation and their crystal structure properties as well as microstructural, thermal and electrical characteristics are studied by the means of X-ray diffraction analysis, high-temperature dilatometry, scanning electron spectroscopy, impedance and 4-probe DC conductivity techniques. The established properties are critically compared with previously obtained data to confirm the prospects of the proposed method synthesis for the preparation of Zr-based proton-conducting ceramic materials. It is found that CaZr0.95Sc0.05O3–δ exhibits predominantly protonic conductivity under wet air atmospheres below 700 °C; while, CaZr0.9In0.1O3–δ demonstrates a certain value of electronic conductivity along with ionic one. © 2017 Elsevier Ltd and Techna Group S.r.l.