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In this work, barium iron niobate, Ba (Fe1/2Nb1/2) O3 powder has been successfully synthesized by the sol-gel method. The formation of the perovskite structure of BFN was followed with the help of X-ray diffraction (XRD), and has shown a crystallite size at a nanometric scale. The pure perovskite phase was obtained at relatively low temperature (900°C /8 h) compared to the conventional solid-state reaction. Moreover, dielectric measurements showed strong relaxation and diffuse phenomena, and a maximum of the dielectric permittivity at a temperature lower than those reported in the literature,…mehr

Produktbeschreibung
In this work, barium iron niobate, Ba (Fe1/2Nb1/2) O3 powder has been successfully synthesized by the sol-gel method. The formation of the perovskite structure of BFN was followed with the help of X-ray diffraction (XRD), and has shown a crystallite size at a nanometric scale. The pure perovskite phase was obtained at relatively low temperature (900°C /8 h) compared to the conventional solid-state reaction. Moreover, dielectric measurements showed strong relaxation and diffuse phenomena, and a maximum of the dielectric permittivity at a temperature lower than those reported in the literature, together with resonance phenomenon at high frequency values. Impedance parameters were extracted from the permittivity analysis and enabled us in particular, to determine the coefficient charge of the sample.
Autorenporträt
Fatimazahra Krimech est née à Fès au Maroc. Elle est étudiante en doctorat à la Faculté des Sciences de l'Université Sidi Mohammed Ben Abdellah -Fes- Maroc. Son domaine d'intérêt de recherche est Synthèse et caractérisations structurelles et diélectriques des matériaux ferroélectriques. Elle est l'auteur de plusieurs articles publiés dans des revues réputées.