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Lead-free Na 0.5 Bi 0.5 TiO 3 -BaTiO 3 ceramics have been prepared in the whole range of concentrations and studied at room-temperature by means of X-ray, Raman scattering and infrared techniques. X-ray measurements revealed rhombohedral, rhombohedral-tetragonal boundaries and tetragonal modifacations depending on the contents of BaTiO 3 . The distinct changes of the Raman and infrared spectra with increasing of BaTiO 3 content, which were correlated with X-ray results, were observed. The broad phonon spectra indicated the disorder in the A site of Na 0.5 Bi 0.5 TiO 3 -BaTiO 3 system.
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Suchanicz et al. (2011) studied this question.
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