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- W2891855705 abstract "Bi2Fe4O9 was prepared by solid-state reaction and the electrical properties measured by impedance spectroscopy. 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." @default.
- W2891855705 created "2018-09-27" @default.
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- W2891855705 date "2019-02-01" @default.
- W2891855705 modified "2023-10-11" @default.
- W2891855705 title "Electrical properties of bismuth ferrites: Bi2Fe4O9 and Bi25FeO39" @default.
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- W2891855705 doi "https://doi.org/10.1016/j.jeurceramsoc.2018.09.008" @default.
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