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RESEARCH PRODUCT
Influence of uniaxial pressure and aging on dielectric and ferroelectric properties of BaTiO3ceramics
M. SokolowskiG. KlimkowskiDorota SitkoBarbara Garbarz-glosAndris SternbergMaija AntonovaJan Suchaniczsubject
Batio3 ceramicsPermittivityCondensed Matter::Materials ScienceMaterials scienceCondensed matter physicsElectrostrictionElectric fieldHardening (metallurgy)General Materials ScienceDielectricPolarization (electrochemistry)InstrumentationFerroelectricitydescription
The effect of uniaxial pressure (0–3000 bar) applied parallel to the AC electric field and aging on dielectric and ferroelectric behavior of BaTiO3 ceramics were investigated. Applying uniaxial pressure leads to a reduction of the peak intensity of the electric permittivity (e) of the polarization as well as of the dielectric hysteresis. The peak intensity of e becomes diffused and shifts to a higher temperatures with increasing the pressure. The electrostrictive coefficient Q 11 and differential permittivity were evaluated from the obtained data. We interpreted our results based on the hardening of the soft-mode and domain switching processes under the action of pressure. The aging effect followed a logarithmic law and is related to the relaxation of the domain structure toward an equilibrium configuration. The aging rate was found to decrease with increasing frequency as a result of the pinning of polarization components by defects field.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-09-01 | Phase Transitions |