A new comprehensive model for the pyroelectric property of 0-3 ferroelectric composites
| Autor: | Duanming Zhang, Zhicheng Zhong, Ke-Yu Zhen, Fengxia Yang, Xiangyun Han, Nian Wei |
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| Rok vydání: | 2006 |
| Předmět: |
Laplace's equation
Materials science Acoustics and Ultrasonics Condensed Matter::Other Differential equation Dielectric Condensed Matter Physics Ferroelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Pyroelectricity Condensed Matter::Materials Science symbols.namesake Maxwell's equations Electrical resistivity and conductivity Physics::Atomic and Molecular Clusters symbols Boundary value problem Composite material |
| Zdroj: | Journal of Physics D: Applied Physics. 39:1963-1969 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/39/9/037 |
| Popis: | A new comprehensive model has been developed for the pyroelectric activity of 0-3 ferroelectric composites which includes additional contributions from the electrical conductivity of the constituents and the frequency of measurement when the secondary pyroelectric effect resulting from the coupled thermoelectroelastic behaviour is considered. The boundary conditions are obtained in terms of the Laplace equation and Maxwell's equations. The analytical expressions have been derived for primary and secondary pyroelectric coefficients. The effects of the electrical conductivity of the matrix σm and the measuring frequency f on the pyroelectric property have been investigated in detail. Possible methods for improving the pyroelectric effect are also discussed. Our model can reflect comprehensively the pyroelectric property of the material and shows reasonably good agreement with experimental data. |
| Databáze: | OpenAIRE |
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