A feasible pathway to stabilize monoclinic and tetragonal phase coexistence in barium titanate-based ceramics. Issue 46 (22nd November 2022)

• Record Type: Journal Article
• Authors: Necib, Jallouli; López-Sánchez, Jesús; Rubio-Marcos, Fernando; Serrano, Aída; Navarro, Elena; Peña, Álvaro; Taoufik, Mnasri; Smari, Mourad; Rojas-Hernández, Rocío Estefanía; Carmona, Noemí; Marín, Pilar
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 46(2022)
• Page Start: 17743
• Page End: 17756
• Publication Date: 2022-11-22
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc04265g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : 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. Abstract : 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 [BaTiO3, (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 BaTiO3 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.