A new piezoelectric hollow cylindrical transducer with multiple concentric annular metal fillers

Wang, Jianjun; Li, Weijie

doi:10.1088/2053-1591/ab0318

Cited by 9 publications

(5 citation statements)

References 58 publications

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“…For the i th electrode layer that is usually assumed as an elastic layer (Brissaud, 2004; Bugdayci et al, 1983; Wang et al, 2013, 2019; Wang and Li, 2019; Xiang and Shi, 2008, 2009; Zhang, 2014; Zhang et al, 2015a, 2017a, 2019a), symbols σ zEi and ε zEi denote the stress and strain in thickness direction, respectively. The linear constitutive equation, the strain–displacement relation, the dynamic equilibrium equation, and the harmonic mechanical components are expressed as follows…”

Section: Theoretical Modelingmentioning

confidence: 99%

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Wang

Cai

Qin

et al. 2020

Journal of Intelligent Material Systems and Structures

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An exact analytical model of frequency-variable piezoelectric stack transducers is proposed, and their dynamic characteristics are studied in this article. Based on the linear piezoelasticity theory, the dynamic analytical solution is first derived, and then its correctness is validated by comparing it with the results of a special example in the previous literature and the ones of the experimental study. The effects of the tuning resistance and the layer number of the active element on the dynamic characteristics are discussed. Numerical results show that tuning the resistance and the layer number of the active element can enable the multi-frequency characteristics of the piezoelectric stack transducers. A proper layer number of the active element can minimize the short-circuited resonance frequency and the open-circuited anti-resonance frequency. These findings provide guidelines to design and optimize the piezoelectric stack transducers, which have promising potential in developing the multi-frequency Langevin transducers for some underwater sound and ultrasonic applications, such as ultrasonic cleaning, ultrasonic chemistry, and sonar radiators.

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Section: Theoretical Modelingmentioning

confidence: 99%

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Wang

Cai

Qin

et al. 2020

Journal of Intelligent Material Systems and Structures

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“…Due to the large difference of thermal expansion coefficient, the metal electrode deposited by sputtering directly on the electrode would be easy to crack, which would affect the conductive effect of the electrode. Therefore, in order to solve the abovementioned problems of PDMS, based on the research of many scholars [ 23 , 24 , 25 , 26 , 27 ], the PDMS was doped with Al 2 O 3 :SiO 2 (1:6) powder, with the hope of reduce the attenuation, increasing the adhesion of the electrode, and reducing the loss tangent. Experiments have proved that when doped with 3 wt.% Al 2 O 3 :SiO 2 (1:6) powder, the loss tangent of the polymer phase is about 0.01~0.03, and the adsorption force to the electrode is the best (see the following comparison).…”

Section: Theoretical Research and Transducer Designmentioning

confidence: 99%

“…In order to improve the high attenuation of PDMS, fillers are doped in PDMS. The study by Wang et al [ 23 ] showed that the addition of metal aluminum with a smaller Young’s modulus can obtain a larger electromechanical coupling coefficient. Sundar et al’s [ 24 ] research indicated that the addition of Al particles improved dielectric and piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Design of Piezoelectric Ultrasonic Transducer Based on Doped PDMS

Yang

Liu

Gao

et al. 2021

Sensors

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The performance of the ultrasonic transducer will directly affect the accuracy of ultrasonic experimental measurement. Therefore, in order to meet the requirements of a wide band, a kind of annular 2-2-2 piezoelectric composite is proposed based on doped PDMS. In this paper, the transducer structure consisted of PZT-5A piezoelectric ceramics and PDMS doped with 3 wt.% Al2O3:SiO2 (1:6) powder, which constituted the piezoelectric composite. MATLAB and COMSOL software were used for simulation. Meanwhile, the electrode materials were selected. Then, the performance of the designed annular 2-2-2 ultrasonic transducer was tested. The simulation results show that when the polymer phase material of the piezoelectric ultrasonic transducer is doped PDMS, the piezoelectric phase and the ceramic substrate account for 70% of the total volume, the polymer phase accounts for 30% of the total volume, and the maximum frequency band width can reach 90 kHz. The experimental results show that the maximum bandwidth of −3 dB can reach 104 kHz when the frequency is 160 kHz. The results of the electrode test show that the use of Cu/Ti electrode improves the electrical conductivity of the single electrode. In this paper, the annular 2-2-2 transducer designed in the case of small volume had the characteristics of a wide frequency band, which was conducive to the miniaturization and integration of the transducer. Therefore, we believe that the annular 2-2-2 piezoelectric composite has broad application prospects.

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“…Recently, multilayer piezoelectric composite cylindrical transducers (Wang and Li, 2019; Wang et al, 2019; Wang and Shi, 2013, 2016) were proposed aiming at excellent performance similar to the piezoelectric stack (Yao et al, 2000; Zhang et al, 2015b, 2016, 2017). Furthermore, by combining the resistance adjusting method and the ratio adjusting method in the axially polarized multilayer piezoelectric composite cylindrical transducers, more diversified multifrequency characteristics can be obtained (Wang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of axially polarized multilayer piezoelectric composite cylindrical transducers with adjustable multifrequency

Qin

Wang

et al. 2021

Journal of Intelligent Material Systems and Structures

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The axially polarized multilayer piezoelectric composite cylindrical transducers with adjustable multifrequency capability have been proposed by adjusting the external electric resistance and the ratio of piezoelectric layer numbers between the actuator part and the sensor part, which have promising potential in designing the novel cymbal transducer for underwater sound projector and ultrasonic radiator applications. In the previous studies, the multilayer models were established to guide the design of the transducers with arbitrary layer number, and analyzed the dynamic characteristics theoretically. In this work, an experimental study is performed to validate the theoretical models and predictions. Piezoelectric rings with multiple concentric annular electrodes are designed to characterize the multilayer piezoelectric composite cylindrical transducers. The top surface of the piezoelectric rings is divided into two separate parts. One part is covered by multiple concentric annular electrodes, corresponding to the piezoelectric layers, and the other part is uncovered, corresponding to the elastic layers. Four prototypes are fabricated and each consists of four concentric annular electrodes. The impedance spectra are measured by the impedance analyzer to obtain the resonance and anti-resonance frequencies. Effects of two adjusting methods on the dynamic characteristics are evaluated experimentally. The experimental results basically coincide with the theoretical ones. This comprehensive experimental work assures the feasibility of using axially polarized multilayer piezoelectric composite cylindrical transducers with adjustable multifrequencies and confirms the benefit of the developed theoretical models for guiding the fabrication and optimization of this type of transducers.

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A new piezoelectric hollow cylindrical transducer with multiple concentric annular metal fillers

Cited by 9 publications

References 58 publications

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Modeling and electromechanical performance analysis of frequency-variable piezoelectric stack transducers

Design of Piezoelectric Ultrasonic Transducer Based on Doped PDMS

Experimental validation of axially polarized multilayer piezoelectric composite cylindrical transducers with adjustable multifrequency

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