An accurate equivalent circuit for the unloaded piezoelectric vibrator in the thickness mode
| Autor: | Stewart Sherrit, B. K. Mukherjee, Michael Sayer, H. D. Wiederick |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Piezoelectric coefficient
Materials science Acoustics and Ultrasonics Acoustics Electrical element Dielectric Condensed Matter Physics Lead zirconate titanate Piezoelectricity Vibrator (mechanical) Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science chemistry.chemical_compound chemistry Equivalent circuit Electrical impedance |
| Zdroj: | Journal of Physics D: Applied Physics. 30:2354-2363 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/30/16/014 |
| Popis: | An equivalent circuit model for the unloaded piezoelectric vibrator in the thickness mode is presented. The model contains two branches, the motional branch and the static branch, like the lossless resonator model, but the circuit elements are generalized by making each a complex constant. The mechanical, dielectric and piezoelectric losses associated with the vibrator are accounted for by the imaginary components of the circuit elements. The model produced impedance curves that closely matched the impedance calculated by using equations derived from vibration theory and the data measured for lead zirconate titanate and PVDF - TRFE co-polymer samples. The calculation of the circuit parameters from the complex elastic, dielectric and piezoelectric material constants is straightforward and the model accurately fits both the baseline dielectric behaviour and the piezoelectric resonance around and below the fundamental resonance. Conversely, when the complex circuit parameters are known, the complex material constants can be derived by straightforward calculations without any loss of information. |
| Databáze: | OpenAIRE |
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