Effect of thickness on the performance parameters of modified 1–3 piezoelectric composites

Qin, Hao; Lu, Hui-Hu; Zhou, Junhu; Zhang, Ye

doi:10.1016/j.ceramint.2022.11.286

Cited by 6 publications

(1 citation statement)

References 13 publications

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“…Piezoelectric composites have been widely used in medical ultrasound imaging and non-destructive testing [1] as the energy convention component of transducers [2,3], which detect abnormal human tissues and small defects in semiconductor component. The 1-3 piezoelectric composite often uses epoxy to connect the piezoelectric column array [4], which can effectively reduce the acoustic impedance, increase transmission sensitivity, improve resolution, increase energy conversion efficiency, and increase flexibility [5][6][7][8]. However, when the periodic piezoelectric composite was excited by an electrical signal at a certain frequency, the vibrations caused the piezoelectric columns to deform and generate the acoustic wave in the longitudinal and lateral direction, which was easy to produce Bragg diffraction [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Filling Material Properties on 1-3 Piezoelectric Composite Performance

Liu,

Zhou,

Zhao

et al. 2024

Micromachines

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The 1-3 piezoelectric composite is the key component of the acoustic transducer, which is widely used in detection, due to the high energy conversion efficiency, cheap raw material, and low aging. To reveal the influence of epoxy mixture, used to connect the piezoelectric column, on the composite performance, a 1-3 piezoelectric composite model was built. The effects of mixture properties on the impedance curves, vibration mode, and deformation displacement of the composite were determined. Six 1-3 piezoelectric composites with different filling mixture properties, by changing the glass microspheres’ mass ratio in the epoxy, were prepared and measured to validate the model. The results showed that with the increase in the proportion of the glass microsphere in the epoxy mixture, the vibration coupling of the piezoelectric composites was gradually eliminated. The acoustic impedance was reduced by 12%. The electromechanical coupling coefficient and effective electromechanical coupling coefficient were increased by 5.4% and 8.3%, respectively. The density and Young’s modulus decrease in filling mixture can significantly improve piezoelectric composite performance.

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