Study of Acoustic Wave Resonance in Piezoelectric PVF<sub>2</sub>Film

Bui, Laura; Shaw, H.J.; Zitelli, L.

doi:10.1109/t-su.1977.30954

Cited by 55 publications

(11 citation statements)

References 4 publications

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“…The resonant frequencies obtained above may be compared with the results from the one-dimensional model due to Bui, Shaw, and Zitelli, 19 and further developed by Dias. 12 Assuming equal forces and velocities on the two sides of the resonator, and taking current as zero, this model gives resonant frequencies at…”

Section: Results For Homogeneous Ceramic or Polymersmentioning

confidence: 92%

Finite-difference modeling of piezoelectric composite transducers

Hornsby

Das-Gupta

2000

Journal of Applied Physics

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Piezoelectric resonator arrays for tunable acoustic waveguides and metamaterials J. Appl. Phys. 112, 064902 (2012) Focused high frequency needle transducer for ultrasonic imaging and trapping Appl. Phys. Lett. 101, 024105 (2012) A rigid, monolithic but still scannable cavity ring-down spectroscopy cell Rev. Sci. Instrum. 83, 043115 (2012) Acoustic resonator based on periodically poled transducers: Concept and analysisThe mechanical and electrical properties of transducers are modeled by finite-difference representations of the relevant physical equations, and the numerical problems are discussed. The theory is applied to ͑a͒ a ceramic transducer of dimensions 1 cmϫ1 cmϫ200 m, ͑b͒ a polymer P of the same dimensions, and ͑c͒ a 1-3 composite transducer consisting of transverse rods of ceramic embedded in a matrix of polymer. The results for the ceramic agree with the one-dimensional model, viz.:voltage of order 4-5 V and no resonance below 10 MHz. For the polymer, the resonant frequency of 3.9 MHz is close to the 4 MHz predicted by the one-dimensional theory. For the composite, introduction of the ceramic has an immediate effect on s 11 , s 12 and s 13 , whereas it has little effect on d 31 unless the density of the ceramic in the mix is 30% or higher.

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Section: Results For Homogeneous Ceramic or Polymersmentioning

confidence: 92%

Finite-difference modeling of piezoelectric composite transducers

Hornsby

Das-Gupta

2000

Journal of Applied Physics

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“…Good agreement has been achieved as shown in Figure 3. Due to the large resistive loss by R 1 , the P(VDF-TrFE) film 9 resonator is a low-Q resonator [27], which is manifestly below 15 in the measurement.…”

Section: Theorymentioning

confidence: 92%

A wireless low-range pressure sensor based on P(VDF-TrFE) piezoelectric resonance

Kan

2010

Sensors and Actuators A: Physical

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A low-range bio-compatible pressure sensor based on P(VDF-TrFE) piezoelectric resonance has been tested and integrated to a wireless platform. Many critical physiological applications and in-vivo diagnosis require highly sensitive pressure monitoring in the 0-100kPa range, with negligible long-term drift and robust integration platform. The PVDF film and its copolymers exhibit significant piezoelectric properties after poling. P(VDF-TrFE) is preferred for its flexible film structure, low modulus, high yield strength and resistance to corrosive chemicals. All piezoelectric materials are lossy and thus the leakage current will cause drift of instantaneous response, which limits the direct use of piezoelectric charges in sensing.In this paper, the pressure sensor which adopts the appropriate properties of P(VDFTrFE) for low pressure levels, works as an acoustic wave resonator to avoid long-term

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“…The coefficient is then given by 8702A). The composite samples were suspended freely in air and their electrical impedances measured over the frequency range 300 kHz to 50 MHz where the total impedance at resonance is given by the sum of the electrical impedance and the acoustic impedances (14,(16)(17)(18). The piezoelectric, electrical and electromechanical coupling coefficients for these composites have been reported in previous papers (6,12).…”

Section: Characterizationmentioning

confidence: 99%

Characterization and evaluation of piezoelectric composite bimorphs forin‐situacoustic emission sensors

Wenger

Blanas

Shuford

et al. 1999

Polymer Engineering & Sci

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Aberdeen Proving Ground, Maryland 21 005-5069Mixed connectivity composites consisting of a ferroelectric ceramic powder of calcium modified lead titanate dispersed in a polymer matrix have been fabricated into piezoelectric bimorph sensors. The piezoelectric, dielectric and electromechanical coupling coefficients of these sensors have been measured and a full characterization of the electromechanical properties are reported. The suitability of these bimorph transducers as in-situ acoustic emission sensors, embedded into glassepoxy laminate plate like structures, has been investigated. A comparison of the performance of these sensors to those of previously investigated monomorph sensors fabricated from the same material has been made. SCIENCE, MARCH 1999, V d . 39, No. 3 508 POLYMER ENGINEERING AND

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Study of Acoustic Wave Resonance in Piezoelectric PVF₂Film

Cited by 55 publications

References 4 publications

Finite-difference modeling of piezoelectric composite transducers

Finite-difference modeling of piezoelectric composite transducers

A wireless low-range pressure sensor based on P(VDF-TrFE) piezoelectric resonance

Characterization and evaluation of piezoelectric composite bimorphs forin‐situacoustic emission sensors

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Study of Acoustic Wave Resonance in Piezoelectric PVF2Film

Cited by 55 publications

References 4 publications

Finite-difference modeling of piezoelectric composite transducers

Finite-difference modeling of piezoelectric composite transducers

A wireless low-range pressure sensor based on P(VDF-TrFE) piezoelectric resonance

Characterization and evaluation of piezoelectric composite bimorphs forin‐situacoustic emission sensors

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Study of Acoustic Wave Resonance in Piezoelectric PVF₂Film