Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics
The effects of Na+ substitution by Y3+ on the structural, microstructural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 compositions with (x = 0, 0.02 and 0.04) have been studied in detail. The solid solutions of different compositions were prepared by the solid state reaction route m...
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Elsevier
2023-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023082452 |
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| author | El Hassan Yahakoub Amine Bendahhou Ilyas Jalafi Fatima Chaou Soufian EL Barkany Zahra Bahari Mohamed Abou-Salama |
| author_facet | El Hassan Yahakoub Amine Bendahhou Ilyas Jalafi Fatima Chaou Soufian EL Barkany Zahra Bahari Mohamed Abou-Salama |
| author_sort | El Hassan Yahakoub |
| collection | DOAJ |
| description | The effects of Na+ substitution by Y3+ on the structural, microstructural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 compositions with (x = 0, 0.02 and 0.04) have been studied in detail. The solid solutions of different compositions were prepared by the solid state reaction route method and characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Complex Impedance Spectroscopy (CIS) techniques. The XRD study confirmed that all prepared compositions have a single-phase orthorhombic tungsten bronze structure with space group Cmm2 at room temperature. The microstructural studies revealed a grain shape and size change in response to increasing Y3+ concentration. The dielectric properties of the obtained compositions are evaluated over a temperature range of 40–600 °C. The dielectric properties were improved for the Y2O3-substituted Ba2NaNb5O15 compound compared to the undoped Ba2NaNb5O15 compound. The non-Debye type relaxation mechanism is confirmed by the -Z″ versus Z′ traces. The grain contribution was studied using an equivalent electrical circuit with a Resistor R, a Capacitor C, and a Constant-Phase Element CPE in parallel, in the absence of the grain boundary response and the electrode effect in the frequency range 10 Hz-1MHz. The experimental AC conductivity data were evaluated by using Jonscher's power law. The activation energies obtained from the relaxation and conduction processes, present two different regions as a function of temperature related to the two electrical processes for the prepared ceramics. |
| first_indexed | 2024-03-09T09:20:33Z |
| format | Article |
| id | doaj.art-04e38961f3a24396aa3ebfb79046e226 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-09T09:20:33Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-04e38961f3a24396aa3ebfb79046e2262023-12-02T07:01:07ZengElsevierHeliyon2405-84402023-11-01911e21037Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramicsEl Hassan Yahakoub0Amine Bendahhou1Ilyas Jalafi2Fatima Chaou3Soufian EL Barkany4Zahra Bahari5Mohamed Abou-Salama6Laboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, Morocco; Corresponding author.Laboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoLaboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoLaboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoLaboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoLaboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoLaboratory of Molecular Chemistry, Materials and Environment, Department of Chemistry, Faculty Multidisciplinary Nador, University Mohamed Premier, B.P. 300, Selouane, Nador 62700, MoroccoThe effects of Na+ substitution by Y3+ on the structural, microstructural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 compositions with (x = 0, 0.02 and 0.04) have been studied in detail. The solid solutions of different compositions were prepared by the solid state reaction route method and characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Complex Impedance Spectroscopy (CIS) techniques. The XRD study confirmed that all prepared compositions have a single-phase orthorhombic tungsten bronze structure with space group Cmm2 at room temperature. The microstructural studies revealed a grain shape and size change in response to increasing Y3+ concentration. The dielectric properties of the obtained compositions are evaluated over a temperature range of 40–600 °C. The dielectric properties were improved for the Y2O3-substituted Ba2NaNb5O15 compound compared to the undoped Ba2NaNb5O15 compound. The non-Debye type relaxation mechanism is confirmed by the -Z″ versus Z′ traces. The grain contribution was studied using an equivalent electrical circuit with a Resistor R, a Capacitor C, and a Constant-Phase Element CPE in parallel, in the absence of the grain boundary response and the electrode effect in the frequency range 10 Hz-1MHz. The experimental AC conductivity data were evaluated by using Jonscher's power law. The activation energies obtained from the relaxation and conduction processes, present two different regions as a function of temperature related to the two electrical processes for the prepared ceramics.http://www.sciencedirect.com/science/article/pii/S2405844023082452X-ray diffractionTungsten bronzeDielectricFerroelectric and Nyquist plot |
| spellingShingle | El Hassan Yahakoub Amine Bendahhou Ilyas Jalafi Fatima Chaou Soufian EL Barkany Zahra Bahari Mohamed Abou-Salama Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics Heliyon X-ray diffraction Tungsten bronze Dielectric Ferroelectric and Nyquist plot |
| title | Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics |
| title_full | Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics |
| title_fullStr | Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics |
| title_full_unstemmed | Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics |
| title_short | Effect of sodium substitution by yttrium on the structural, dielectric and electrical properties of Ba2Na(1-3x)YxNb5O15 ceramics |
| title_sort | effect of sodium substitution by yttrium on the structural dielectric and electrical properties of ba2na 1 3x yxnb5o15 ceramics |
| topic | X-ray diffraction Tungsten bronze Dielectric Ferroelectric and Nyquist plot |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023082452 |
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