Influence of Electromechanical Fields on Dielectric Properties of PLZT−x/65/35 Ceramics (x = 6 and 7).
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| Title: | Influence of Electromechanical Fields on Dielectric Properties of PLZT−x/65/35 Ceramics (x = 6 and 7). |
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| Authors: | Suchanicz, J.1 sfsuchan@ap.krakow.pl, Pytel, K.2, Konieczny, K.1, Sokolowski, M.3, Finder, A.4, Garbarz-Glos, B.1, Antonova, M.5, Sternberg, A.5 |
| Source: | Ferroelectrics. 2011, Vol. 418 Issue 1, p116-123. 8p. |
| Subjects: | Piezoelectric ceramics, Dielectrics, Density, Transparency (Optics), High pressure (Science), Permittivity, Temperature effect, Electric fields, Solid solutions |
| Abstract: | High density and transparent PLZT−x/65/35 (x = 6 and 7) ceramics with the average grain size of 5–7 μm was obtained by two−stage hot−pressing technology. The measurements of temperature/frequency dependence of the permittivities of these ceramics under uniaxial pressure (0–100 MPa) applied parallel to the ac electric field have been carried out. It was found that uniaxial pressure significantly influences dielectric properties of these ceramics. With the increase of pressure the maximum intensity in ϵ(T) curve decreases, becomes more diffuse and shifts towards higher temperature, dielectric dispersion decreases and classical ferroelectric seems to change to relaxor one. It was concluded, that the applied uniaxial pressure or increasing Ti−ions content in PZT solid solutions induces similar effects. The results were discussed in term of an elastic changes in inter−ionic distances in the crystal structure and domain switching under the action of electromechanical loading. [ABSTRACT FROM PUBLISHER] |
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| Database: | Engineering Source |
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