Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/296
The Global and Local Symmetries of Nanostructured Ferroelectric Relaxor 0.94(Bi0.5Na0.5)TiO3 – 0.06BaTiO3
LUIS EDMUNDO FUENTES COBAS
MARIA ELENA MONTERO CABRERA
MARIA ELENA FUENTES MONTERO
Acceso Abierto
Atribución-NoComercial
http://dx.doi.org/10.1080/00150193.2014.948358
Novel submicrometer-grained 0.94(Bi0.5Na0.5)TiO3 – 0.06 BaTiO3 ceramic, prepared from nanopowder by a combination of hot-pressing and recrystallization, is investigated by high-resolution synchrotron x-ray diffraction and x-ray absorption near-edge spectroscopy (XANES). The simplest and best-fitting Rietveld refinement of the performed wide-Q diffraction experiment corresponds to a three-phase system formed by a ferroelectric rhombohedral R3c phase, a globally cubic Pm m phase and a small amount of nanosized (∼12 nm) quasi-cubic phase. The globally cubic phase and the nanosized one built up a complex, nanostructured, configuration that accounts for the reported dielectric relaxor behavior. XANES reveals that the departures from centro-symmetry at the unit cell scale for the precursor powder and for the sintered ceramic are practically the same.
2013
Artículo
Inglés
Montero-Cabrera, M. E., Pardo, L., Garcia, A., Fuentes-Montero, M. E., Ballinas-Casarrubias, M. L., & Fuentes-Cobas, L. E. (2014). The global and local symmetries of nanostructured ferroelectric relaxor 0.94 (Bi0. 5Na0. 5) TiO3–0.06 BaTiO3. Ferroelectrics, 469(1), 50-60.
QUÍMICA
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