Artículo
Electrical properties of bismuth ferrites: Bi2Fe4O9 and Bi25FeO39
Autor/es | Perejón Pazo, Antonio
Gil González, Eva Sánchez Jiménez, Pedro Enrique West, Anthony R. Pérez Maqueda, Luis Allan |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2019 |
Fecha de depósito | 2022-10-05 |
Publicado en |
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Resumen | Bi2Fe4O9 was prepared by solid-state reaction and the electrical properties measured by impedance spectro-
scopy. After annealing in O2 at 900 °C, Bi2Fe4O9 is an electrically-homogeneous insulator. Its high frequency
p ... Bi2Fe4O9 was prepared by solid-state reaction and the electrical properties measured by impedance spectro- scopy. After annealing in O2 at 900 °C, Bi2Fe4O9 is an electrically-homogeneous insulator. Its high frequency permittivity is constant (∼14.1) over the temperature range 300–400 °C and shows no evidence of incipient ferroelectricity at lower temperatures. On annealing in N2 at 900 °C, the pellets gradually decompose. Bi25FeO39 was prepared by both solid-state reaction and mechanosynthesis. It showed a modest amount of mixed conduction of both oxide ions and holes. Impedance analysis showed a complex response that best fitted an equivalent circuit consisting of a parallel combination of long-range conduction and short range dielectric relaxation elements. The electrical conductivity of both Bi2Fe4O9 and Bi25FeO39 is less than that of BiFeO3 prepared by solid-state reaction, which indicates that any leakage conductivity of BiFeO3 is not due to the possible presence of small amounts of these secondary phases. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Identificador del proyecto | CTQ2014-52763-C2
CTQ2017-83602-C2 |
Cita | Perejón Pazo, A., Gil González, E., Sánchez Jiménez, P.E., West, A.R. y Pérez Maqueda, L.A. (2019). Electrical properties of bismuth ferrites: Bi2Fe4O9 and Bi25FeO39. Journal of the European Ceramic Society, 39 (2-3), 330-339. https://doi.org/10.1016/j.jeurceramsoc.2018.09.008. |
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Bismuth ferrites paper.pdf | 1.004Mb | [PDF] | Ver/ | Es versión aceptada del artículo publicado. |