Artículo
Electrical properties of stoichiometric BiFeO3 prepared by mechanosynthesis with either conventional or spark plasma sintering
Autor/es | Poyato Galán, Rosalía
Perejón Pazo, Antonio Masó, Nahum Sánchez Jiménez, Pedro Enrique Criado Luque, José Manuel Pérez Maqueda, Luis Allan |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2013 |
Fecha de depósito | 2018-05-07 |
Publicado en |
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Resumen | Phase-pure powders of stoichiometric BiFeO3 have been prepared by mechanosynthesis. Ceramics sintered by either conventional heating in air or spark plasma sintering (SPS) followed by oxidative anneal in air are highly ... Phase-pure powders of stoichiometric BiFeO3 have been prepared by mechanosynthesis. Ceramics sintered by either conventional heating in air or spark plasma sintering (SPS) followed by oxidative anneal in air are highly insulating with conductivity e.g. ~10–6 Scm–1 at 300 °C and activation energy 1.15(2) eV, which are comparable to those of a good-quality BiFeO3 single crystal. By contrast, the as-prepared SPS sample without the post-sinter anneal shows higher conductivity e.g. ~10–6 Scm–1 at 225 °C and lower activation energy 0.67(3) eV, indicating some reduction of the sample by the SPS process. The reason for the high conductivity observed in some ceramic samples reported in the literature appears to be unclear at present |
Agencias financiadoras | Gobierno de España Junta de Andalucía |
Identificador del proyecto | TEP-03002
CTQ 2011-27626 MAT 2008-06619 |
Cita | Poyato Galán, R., Perejón Pazo, A., Masó, N., Sánchez Jiménez, P.E., Criado Luque, J.M. y Pérez Maqueda, L.A. (2013). Electrical properties of stoichiometric BiFeO3 prepared by mechanosynthesis with either conventional or spark plasma sintering. Journal of the American Ceramic Society, 96, 1220-1227. |
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