Title :
Simple electric equivalent circuit method to determine piezoelectric and elastic properties of piezoelectric polymer film
Author :
Markiewicz, E. ; Kulek, J. ; Pawlaczyk, Cz
Author_Institution :
S.A. Laudspeaker Factory, Wrzesnia, Poland
fDate :
6/1/1999 12:00:00 AM
Abstract :
A simple method is proposed to determine the parameters of a piezoelectric resonator equivalent circuit in the frequency range from 1 MHz to 1 GHz. Traditional methods use an electronic setup which always involves significant frequency range limitations. The present method overcomes this limitation by simultaneous measurement of the reflectivity coefficient of two samples with HP4191A RF impedance analyzer. The measurements are carried out on films of polyvinylidenefluoride (PVDF) and its copolymer (PVDF/trifluoroethylene (TRFE))(0.75/0.25) which were corona charged as well as corona charged and then thermally aged. Piezoelectric and elastic constants are calculated using the parameters of the piezoelectric resonator equivalent circuit
Keywords :
ageing; corona; crystal resonators; elastic constants; equivalent circuits; piezoelectric thin films; polymer blends; polymer films; PVDF/trifluoroethylene; RF impedance analyzer; copolymer; corona charged; elastic constants; equivalent circuit method; piezoelectric constants; piezoelectric polymer film; piezoelectric resonator; polyvinylidenefluoride; reflectivity coefficient; thermally aged; Capacitance measurement; Corona; Equivalent circuits; Frequency measurement; Impedance measurement; Polymer films; RLC circuits; Radio frequency; Reflectivity; Resonance;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
