Local residual stresses in pressure-treated barium titanate powders probed by inelastic light scattering

Properties of the barium titanate submicron powder treated by high pressure were studied by Raman scattering. Residual mechanical stresses were estimated to be about 2 GPa in barium titanate powder treated under uniaxial pressure of 4 GPa. It is supposed that these mechanical fields change the chara...

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Published inFerroelectrics Vol. 496; no. 1; pp. 225 - 230
Main Authors Pugachev, A.M., Malinovsky, V.K., Surovtsev, N.V., Borzdov, Yu.M., Raevskii, I.P., Raevskaya, S.I., Malitskaya, M.A.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 27.05.2016
Taylor & Francis Ltd
Subjects
Annealing
Barium titanate
Barium titanates
central peak
Disorders
Ferroelectric materials
ferroelectric phase transition
Ferroelectrics
Low frequencies
Phase transitions
Raman scattering
Residual stress
Scattering
Stresses
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Summary:Properties of the barium titanate submicron powder treated by high pressure were studied by Raman scattering. Residual mechanical stresses were estimated to be about 2 GPa in barium titanate powder treated under uniaxial pressure of 4 GPa. It is supposed that these mechanical fields change the characteristics of the central peak of the Raman spectra in the low frequency part. It is shown that central peak in pressure-treated powder corresponds to a broad distribution of relaxation times. Such behavior is typical for relaxors known as materials with the compositional disorder. Annealing decreases the residual mechanical stresses.
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ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2016.1155395