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Impedance and Mössbauer spectroscopy study of BiCu3Ti3FeO12 dielectric matrix

Freitas, D. B. ; Bezerra Júnior, M. H. ; Oliveira, R. G. M. ; de Morais, J. E. V. ; Bessa, V. L. ; Carmo, F. F. ; Pereira, M. S. ; Vasconcelos, I. F. ; Silva, M. A. S. ; de Andrade, H. D. ; Queiroz Júnior, I. S. ; Silva, R. S. ; Sombra, A. S. B.

Journal of materials science. Materials in electronics, 2021-05, Vol.32 (9), p.11607-11615 [Periódico revisado por pares]

New York: Springer US

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Título:
Impedance and Mössbauer spectroscopy study of BiCu3Ti3FeO12 dielectric matrix
Autor: Freitas, D. B. ; Bezerra Júnior, M. H. ; Oliveira, R. G. M. ; de Morais, J. E. V. ; Bessa, V. L. ; Carmo, F. F. ; Pereira, M. S. ; Vasconcelos, I. F. ; Silva, M. A. S. ; de Andrade, H. D. ; Queiroz Júnior, I. S. ; Silva, R. S. ; Sombra, A. S. B.
Assuntos: Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Dielectric loss ; Dielectric properties ; Materials Science ; Mossbauer spectroscopy ; Optical and Electronic Materials ; Perovskites ; Raman spectroscopy ; Spectrum analysis ; Thermal stability
É parte de: Journal of materials science. Materials in electronics, 2021-05, Vol.32 (9), p.11607-11615
Descrição: In the present work, an electroceramic of the perovskite family, BiCu 3 Ti 3 FeO 12 (BCTFO), was synthesized by the solid-state reaction method. The structural study was performed by X-ray diffraction and Mössbauer and Raman spectroscopy. Electric and dielectric properties were analyzed by impedance spectroscopy and the Hakki-Coleman method. Due to the BCTFO is isostructural of the CaCu 3 Ti 4 O 12 (CCTO), the BCTFO presents as a promissory electroceramic. Mössbauer spectroscopy reveals paramagnetic spectra to BCTFO, with two octahedral sites for iron ions. Regarding dielectric properties, for 1 Hz, BCTFO presents a high relative dielectric permittivity ( ε r ≈ 1 × 10 4 ) and dielectric loss (tan δ > 1) and ε r = 230.88, tan δ ≈ 1 × 10 –2 in the microwave range. The produced ceramic exhibited a high resonance frequency temperature coefficient ( τ f ) with a value of + 2852 ppm °C −1 , making it a candidate for fabrication of the thermostable electroceramic composites with other ceramic matrices with negative τ f values improving the thermal stability.
Editor: New York: Springer US
Idioma: Inglês

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Impedance and Mössbauer spectroscopy study of BiCu3Ti3FeO12 dielectric matrix

Freitas, D. B. ; Bezerra Júnior, M. H. ; Oliveira, R. G. M. ; de Morais, J. E. V. ; Bessa, V. L. ; Carmo, F. F. ; Pereira, M. S. ; Vasconcelos, I. F. ; Silva, M. A. S. ; de Andrade, H. D. ; Queiroz Júnior, I. S. ; Silva, R. S. ; Sombra, A. S. B.

New York: Springer US

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