Synchrotron radiation study of structural tendencies in Aurivillius ceramics
Por:
Fuentes L., Fernandez J.F., Fuentes M.E., Lascano L., Villafuerte M.E., Montero M.E., Olivera R., Mehta A., Jardiel T.
Publicada:
1 ene 2006
Resumen:
A review of structural tendencies, as observed in several synchrotron radiation diffraction studies of Aurivillius phases, is presented. The role of powder synchrotron radiation is analyzed. Investigated phases belong to Aurivillius families with n from 3 to 6, with partial substitution of small Ti cations and of large Bi cations. Representative formulas are: Bi4 Ti3- xWxO12, Bin+1Ti3Fe n-3O3n +3 and (Ba, Pb)2 Bi 4 Ti5 O18. Observed general behavior shows a tendency to increase disorder with increasing chemical complexity. The structure-polarization relationship in Ba2Bi4Ti 5O18 is investigated and a paradox between published results is highlighted. Synchrotron radiation results tend to confirm Lightfoots's conclusions, suggesting electric polarization along the z axis. Copyright © Taylor & Francis Group, LLC.
Filiaciones:
Fuentes L.:
Centro de Investigación en Materiales Avanzados, Chih, Mexico
Fernandez J.F.:
Instituto de Cerámica y Vidrio, Arganda del Rey, Spain
Fuentes M.E.:
Universidad Autónoma de Chihuahua, Chih, Mexico
Lascano L.:
Escuela Politecnica Nacional, Quito, Ecuador
Villafuerte M.E.:
Universidad Nacional Autonónoma de México, Mexico
Montero M.E.:
Centro de Investigación en Materiales Avanzados, Chih, Mexico
Olivera R.:
Centro de Investigación en Materiales Avanzados, Chih, Mexico
Mehta A.:
Stanford Synchrotron Radiation Laboratory, Stanford, United States
Jardiel T.:
Instituto de Cerámica y Vidrio, Arganda del Rey, Spain
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