Phase transition in Basub(2)Insub(2)Osub(5) studied by in situ high temperature X-ray diffraction using synchrotron radiation
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2009
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Synchrotron Radiation in Materials Science: 6th International Conference
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Abstract
The order-disorder phase transition in Ba,In,Os high-temperature ionic conductor was
systematically studied by in situ high-temperature X-ray diffraction using synchrotron radiation
and electrical conductivity. Pure barium indate was prepared by solid state reactions at 1300°C. The room-temperature structural characterization showed a high degree of phase homogeneity in the prepared material. The reduction of the order-disorder phase transition temperature was verified by electrical conductivity and high-temperature X-ray diffraction. The observed features
were explained based on Fourier-transform infrared spectroscopy results that revealed the presence of hydroxyl species in the crystal lattice. The increase of the intensity of few diffraction
peaks near the phase transition temperature suggests the formation of a superstructure before the
orthorhombic-to-tetragonal phase transition.
Citation
REY, J.F.Q.; FERREIRA, F.F.; MUCCILLO, E.N.S. Phase transition in Basub(2)Insub(2)Osub(5) studied by in situ high temperature X-ray diffraction using synchrotron radiation. In: GUIMARAES, V. (ed.); OLIVEIRA, J.R.B. (ed.); MACARIO, K.C.D. (ed.); GENEZINI, F.A. (ed.). Synchrotron Radiation in Materials Science: 6th International Conference. Maryland, USA: AIP: , 2009. p. 150-152. DOI: 10.1063/1.3086214. Disponível em: http://repositorio.ipen.br/handle/123456789/23042. Acesso em: 16 Mar 2025.
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