Quantification of relaxor behavior in (1-x)Na0.5Bi0.5TiO3 - xCaTiO(3) lead-free ceramics system
| Affiliation auteurs | !!!! Error affiliation !!!! |
| Titre | Quantification of relaxor behavior in (1-x)Na0.5Bi0.5TiO3 - xCaTiO(3) lead-free ceramics system |
| Type de publication | Journal Article |
| Year of Publication | 2019 |
| Auteurs | Roukos R, Romanos J, Dargham SAbou, Chaumont D |
| Journal | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY |
| Volume | 39 |
| Pagination | 2297-2303 |
| Date Published | JUL |
| Type of Article | Article |
| ISSN | 0955-2219 |
| Mots-clés | Dielectric properties, NBT-CT, Order of dispersion, Relaxor behavior |
| Résumé | This work examines the relaxor behavior of lead-free ceramic (1 - x)Na0.5Bi0.5TiO3-xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. Relaxor behavior was observed in the temperature range 300 K - 400 K for all materials. Ceramics exhibit normal ferroelectric properties at room temperature, and then they develop relaxor characteristics with increasing temperature showing the same dispersive properties. This work quantifies the relaxor phenomenon at low temperature. For instance, the maximum temperature of relaxor and the order of dispersion were determined at the strongest dispersion. Finally, the substitution by low CT concentration unaltered the relaxor behavior at low temperature. |
| DOI | 10.1016/j.jeurceramsoc.2019.02.015 |