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024 7 _ |a 10.1016/j.jeurceramsoc.2019.01.045
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100 1 _ |a Bernardo, M. S.
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245 _ _ |a Electric current activated sintering (ECAS) of undoped and titanium-doped BiFeO3 bulk ceramics with homogeneous microstructure
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a BiFeO3 ceramics have been consolidated applying an electric current activated/assisted sintering (ECAS) methodology under different electrical conditions. DC experiments produce a flash sintering regime by which the bulk cylindrical specimens densify in a few seconds; however, this goes together with a strong localization of the current flow within the material, leading to a dramatic lack of microstructural and compositional homogeneity. The situation changes under the alternate field; a more gradual FAST (Field Assisted Sintering) event is produced which allows the attainment of an exceptional microstructural homogeneity through the whole sintered compacts. Upon Ti-doping the overall diffusivity of the system is delayed but the AC conditions again yield a remarkable microstructural homogeneity in the consolidated material, this time even at the nanoscale level. Accordingly, bulk BiFeO3 ceramics with homogeneous micro-nanostructure can be successfully prepared by an ECAS methodology and at lower temperatures and much shorter times than by conventional solid-state sintering.
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700 1 _ |a Jardiel, T.
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700 1 _ |a Caballero, A.
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700 1 _ |a Bram, Martin
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700 1 _ |a Gonzalez, Jesus
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700 1 _ |a Peiteado, M.
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773 _ _ |a 10.1016/j.jeurceramsoc.2019.01.045
|g Vol. 39, no. 6, p. 2042 - 2049
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856 4 _ |y Published on 2019-01-24. Available in OpenAccess from 2021-01-24.
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