Local residual stresses in pressure-treated barium titanate powders probed by second harmonic generation
| Autor: | V. I. Kovalevskii, I. P. Raevski, Alexey M. Pugachev, S. I. Raevskaya, I. V. Zaytseva, V. K. Malinovsky, Yu. M. Borzdov, M. A. Malitskaya, Nikolay V. Surovtsev |
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| Rok vydání: | 2016 |
| Předmět: |
Phase transition
Materials science Annealing (metallurgy) Second-harmonic generation 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Residual 01 natural sciences Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Nonlinear system chemistry.chemical_compound chemistry Residual stress 0103 physical sciences Barium titanate Composite material 010306 general physics 0210 nano-technology Single crystal |
| Zdroj: | Ferroelectrics. 501:9-14 |
| ISSN: | 1563-5112 0015-0193 |
| Popis: | Properties of the barium titanate submicron powder treated by high pressure were studied by nonlinear optic techniques. It is shown that the second harmonic signal at the high temperature phase is reliably observed up to 1000 K. The phase transition is broadened on increasing the pressure value. It is supposed that both the temperature dependence of the second harmonic generation and the broadening of the phase transition are effected by residual mechanical stresses. The annealing decreases residual mechanical stresses and changes the properties of the nonlinear signal towards those of single crystal and submicron powder. |
| Databáze: | OpenAIRE |
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