Local residual stresses in pressure-treated barium titanate powders probed by inelastic light scattering
| Autor: | S. I. Raevskaya, V. K. Malinovsky, Alexey M. Pugachev, I. P. Raevskii, M. A. Malitskaya, Nikolay V. Surovtsev, Yu. M. Borzdov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Annealing (metallurgy) macromolecular substances 02 engineering and technology Low frequency 021001 nanoscience & nanotechnology Condensed Matter Physics Residual 01 natural sciences Light scattering Electronic Optical and Magnetic Materials symbols.namesake chemistry.chemical_compound chemistry Residual stress 0103 physical sciences Barium titanate symbols Composite material 010306 general physics 0210 nano-technology Raman spectroscopy Raman scattering |
| Zdroj: | Ferroelectrics. 496:225-230 |
| ISSN: | 1563-5112 0015-0193 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|