Peculiarities of Variation of the Dielectric Permittivity and the Pyroelectric Coefficient with Temperature in PZT-Based Ferrosoft Ceramics Modified with Different Additives of PbGeO3
| Autor: | G. M. Akbaeva, Yu. N. Zakharov, V. Z. Borodin |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Dielectric permittivity Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials Pyroelectricity Control and Systems Engineering visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Curie Ceramic Electrical and Electronic Engineering Polarization (electrochemistry) Maxima |
| Zdroj: | Integrated Ferroelectrics. 69:257-266 |
| ISSN: | 1607-8489 1058-4587 |
| Popis: | The temperature dependencies of the dielectric permittivity ϵ( T) the dynamic pyroelectric coefficient γd( T) and the quasi-static pyroelectric coefficient γst( T) of prepoled samples of the low-coercive materials belonging to the PZT-based multicomponent system modified with 0.5%; 1% and 2% PbGeO3 and having the Curie temperatures T c = 207, 215 and 206°C, respectively, were studied. Polarization of the samples was performed under three different conditions. It was been established that in the ϵ( T) curve one can observe a step-like variation of ϵ( T) or a slope variation at temperatures below the temperature maximum by 40–50°C. The additional low- and high-temperature maxima are observed in the γd( T) and γst( T) curves. |
| Databáze: | OpenAIRE |
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