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Impedance Spectroscopy Study of Bi1.34Fe0.66Nb1.34O6.35 Ceramics

Devesa, S. ; Graça, M. P. ; Costa, L. C.

Journal of electronic materials, 2021-07, Vol.50 (7), p.4135-4144 [Periódico revisado por pares]

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Título:
Impedance Spectroscopy Study of Bi1.34Fe0.66Nb1.34O6.35 Ceramics
Autor: Devesa, S. ; Graça, M. P. ; Costa, L. C.
Assuntos: Bismuth ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Electronics and Microelectronics ; Frequency ranges ; Impedance spectroscopy ; Instrumentation ; Low temperature ; Materials Science ; Morphology ; Optical and Electronic Materials ; Original Research Article ; Sol-gel processes ; Solid phases ; Solid State Physics ; Spectrum analysis ; Temperature dependence
É parte de: Journal of electronic materials, 2021-07, Vol.50 (7), p.4135-4144
Descrição: The bismuth-based pyrochlore, Bi 1.34 Fe 0.66 Nb 1.34 O 6.35 , was prepared by the sol–gel method and synthesized at low temperature. The phase structure and the morphology were studied by x-ray diffraction and scanning electron microscopy. Even with treatments performed at low temperature, the obtained powders showed high crystallinity and nanosized grains. To investigate the dielectric performance, the impedance spectroscopy technique was used in the frequency range of 10 2 -10 6 Hz, in function of the temperature (200-330 K). The prepared samples presented two temperature-dependent relaxation processes, with the corresponding activation energies being calculated by fitting the experimental data to the Arrhenius model. Graphic Abstract
Editor: New York: Springer US
Idioma: Inglês

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