Design of Piezoelectric Ultrasonic Transducer Based on Doped PDMS

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.

[1]  L. Qin,et al.  Preparation of arc broadband piezoelectric composite vibrator and its transducer array , 2017 .

[2]  Bishakh Bhattacharya,et al.  PZT-PDMS composite for active damping of vibrations , 2013 .

[3]  Jianjun Wang,et al.  A new piezoelectric hollow cylindrical transducer with multiple concentric annular metal fillers , 2019, Materials Research Express.

[4]  Mengxi Wu,et al.  Mixing high-viscosity fluids via acoustically driven bubbles , 2017, Journal of micromechanics and microengineering : structures, devices, and systems.

[5]  S. Lew,et al.  A polydimethylsiloxane-based axicon lens for focused ultrasonic brain stimulation techniques , 2019, Acoustical Science and Technology.

[6]  Hong-chao Xu,et al.  Structural design and properties of fine scale 2-2-2 PZT/epoxy piezoelectric composites for high frequency application , 2018, Ceramics International.

[7]  B. A. Auld,et al.  Tailoring the Properties of Composite Piezoelectric Materials for Medical Ultrasonic Transducers , 1985, IEEE 1985 Ultrasonics Symposium.

[8]  David A. Hutchins,et al.  Advances in ultrasonic electrostatic transduction , 1998 .

[9]  Q. Lei,et al.  Modified 1–3 Ceramic/Epoxy Piezocompsite and Cylinder Array Transducer , 2010 .

[10]  K. Saalwächter,et al.  Particle-induced network formation in linear PDMS filled with silica , 2009 .

[11]  G.R. Lockwood,et al.  Design and fabrication of annular arrays for high-frequency ultrasound , 2004, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[12]  S. Joshi,et al.  Liquid level sensor using ultrasonic Lamb waves. , 2003, Ultrasonics.

[13]  Jingbin Zhang,et al.  Acoustic Communication in Wireless Sensor Networks , 2005 .

[14]  C. D. Llorens,et al.  Ultrasonic Transmitter for Positioning of the Large Underwater Neutrino Telescope KM3NeT , 2015 .

[15]  Changgeng Liu,et al.  Micromachined high frequency PMN-PT/Epoxy 1–3 composite ultrasonic annular arrays , 2010, 2010 IEEE International Ultrasonics Symposium.

[16]  H. Chan,et al.  Mode coupling in modified lead titanate/polymer 1–3 composites , 1989 .

[17]  Jingkuang Chen,et al.  Implantable Ultrasound Emitter Array for Medical Applications , 2006, 19th IEEE International Conference on Micro Electro Mechanical Systems.

[18]  J. Michaels,et al.  Feature Extraction and Sensor Fusion for Ultrasonic Structural Health Monitoring Under Changing Environmental Conditions , 2009, IEEE Sensors Journal.

[19]  J. Friend,et al.  Microscale capillary wave turbulence excited by high frequency vibration. , 2013, Langmuir : the ACS journal of surfaces and colloids.

[20]  L. Qin,et al.  Expand bandwidth of composite transducer via matching layer design , 2017 .

[21]  R. Newnham,et al.  Piezoelectric 3–3 composites , 1982 .

[22]  R. Speyer,et al.  Influences of Zirconia and Silicon Nucleating Agents on the Devitrification of Li2O · Al2O3· 6SiO2 Glasses , 1990 .

[23]  B. Auld,et al.  Modeling 1-3 composite piezoelectrics: thickness-mode oscillations , 1991, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[24]  M. Aguilar-Franco,et al.  Functional PDMS enhanced strain at fracture and toughness of DGEBA epoxy resin , 2017 .

[25]  U. Sundar,et al.  Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites , 2016 .

[26]  Chuan Li,et al.  Short-range ultrasonic communications in air using quadrature modulation , 2009, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[27]  W. A. Smith,et al.  Modeling 1-3 composite piezoelectrics: hydrostatic response , 1993, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[28]  R. Kuryaeva.  Effect of pressure on the refractive index and relative density of the CaO · Al2O3 · 6SiO2 glass , 2009 .

[29]  G. Hayward,et al.  A wideband annular piezoelectric composite transducer configuration with a graded active layer profile , 2009, 2009 IEEE International Ultrasonics Symposium.