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Complex structural contribution of the morphotropic phase boundary in Na0.5Bi0.5TiO3 - CaTiO3 system

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dc.contributor.author Roukos, Roy
dc.contributor.author Abou Dargham, Sara
dc.contributor.author Romanos, Jimmy
dc.contributor.author Barakat, Fatima
dc.contributor.author Chaumont, Denis
dc.date.accessioned 2019-10-10T08:22:50Z
dc.date.available 2019-10-10T08:22:50Z
dc.date.copyright 2019 en_US
dc.identifier.issn 1873-3956 en_US
dc.identifier.uri http://hdl.handle.net/10725/11404
dc.description.abstract The correlation between structure and dielectric properties of lead-free (1-x)Na0.5Bi0.5TiO3 - xCaTiO3 ((1-x)NBT - xCT) polycrystalline ceramics was investigated systematically by X-ray diffraction, combined with impedance spectroscopy for dielectric characterizations. The system shows high miscibility in the entire composition range. A morphotropic phase boundary (MPB), at 0.09 ≤ x < 0.15 was identified where rhombohedral and orthorhombic symmetries coexist at room temperature. The fraction of orthorhombic phase increases gradually with x in the MPB region. Dielectric measurements reveal that the relative permittivity increase with addition of Ca2+. This behavior is unusual with this kind of doping. A thermal hysteresis occurred only in the MPB composition which varies in a non-monotonically manner with x, detected by dielectric properties. This phenomenon is related to the crystalline microstructure by a linear relationship between the fraction of each phase and dielectric properties, and, more precisely, to the strong interaction between rhombohedral and orthorhombic phases. en_US
dc.language.iso en en_US
dc.title Complex structural contribution of the morphotropic phase boundary in Na0.5Bi0.5TiO3 - CaTiO3 system en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SAS en_US
dc.author.idnumber 201306300 en_US
dc.author.department Natural Sciences en_US
dc.description.embargo N/A en_US
dc.relation.journal Ceramics International en_US
dc.journal.volume 45 en_US
dc.journal.issue 4 en_US
dc.article.pages 4467-4473 en_US
dc.keywords Morphotropic phase boundary en_US
dc.keywords X-Ray diffraction en_US
dc.keywords Dielectric properties en_US
dc.keywords Thermal hysteresis en_US
dc.keywords NBT-CT en_US
dc.identifier.doi https://doi.org/10.1016/j.ceramint.2018.11.126 en_US
dc.identifier.ctation Roukos, R., Dargham, S. A., Romanos, J., Barakat, F., & Chaumont, D. (2019). Complex structural contribution of the morphotropic phase boundary in Na0. 5Bi0. 5TiO3-CaTiO3 system. Ceramics International, 45(4), 4467-4473. en_US
dc.author.email jimmy.romanos@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0272884218332437#keys0005 en_US
dc.orcid.id https://orcid.org/0000-0002-5408-1657 en_US
dc.author.affiliation Lebanese American University en_US


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