A feasible pathway to stabilize monoclinic and tetragonal phase coexistence in barium titanate-based ceramics
| Autor: | Jallouli Necib, Jesús López-Sánchez, Fernando Rubio-Marcos, Aída Serrano, Elena Navarro, Álvaro Peña, Mnasri Taoufik, Mourad Smari, Rocío Estefanía Rojas-Hernández, Noemí Carmona, Pilar Marín |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Materials Chemistry C. 10:17743-17756 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/d2tc04265g |
| Popis: | Multiphase coexistence has attracted significant interest in recent years because its control has entailed a significant breakthrough for the piezoelectric activity enhancement of lead-free piezoelectric oxides. However, the comprehension of phase coexistence still has many controversies including an adequate synthesis process and/or the role played by crystalline phases in functional properties. In this study, functional barium titanate [BaTiO_(3), (BTO)]-based materials with tunable functional properties were obtained by compositional modification via Bismuth (Bi) doping. Towards this aim, we systematically synthesized BTO-based materials by a sol-gel method, focusing on the control of Bi substitution in the BaTiO_(3) structure. In particular, we found that the substitution of Bi^(+3) leads to the stabilization of a monoclinic-tetragonal (M-T) phase boundary close to room temperature, which facilities the polarization process of the system. As a surprising result, we believe that the simple and cost-effective strategy and design principles described in this work open up the possibility of obtaining BTO-based lead-free ceramics with enhanced properties induced by the stabilization of the phase coexistence, expanding their application range. |
| Databáze: | OpenAIRE |
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