Browse > Article

Fabrication of 1-3 Piezo-composites with a "Dice & Fill" Method and Characterization of Their Piezoelectric Properties as a Function of Lateral Spatial Scale  

Kim, Young-Deog (Research Institute of Industrial Science & Technology, Process Automation Research Center, Sensor & Instrumentation Team)
Kim, Kwang-Il (Research Institute of Industrial Science & Technology, Process Automation Research Center, Sensor & Instrumentation Team)
Jeong, Woo-Cheol (Research Institute of Industrial Science & Technology, Process Automation Research Center, Sensor & Instrumentation Team)
Kim, Heung-Rak (Research Institute of Industrial Science & Technology, Process Automation Research Center, Sensor & Instrumentation Team)
Kim, Dong-Su (Research Institute of Industrial Science & Technology, Process Automation Research Center, Sensor & Instrumentation Team)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.22, no.4, 2002 , pp. 354-360 More about this Journal
Abstract
The piezoelectric composites had many advantages in comparison with conventional piezoelectric ceramics and piezopolymers for ultrasonic transducers used in NDT and in medical ultrasionic imaging. The electromechanical coupling coefficient should be high and the acoustic impedance should be low in these applications. However, the cross-coupling with spurious oscillations caused by laterally running plate waves exhibited complex motions in the surface of piezoelectric composites with coarse lateral spatial scale. The thickness mode electromechanical coupling coefficient of 1-3type of piezoelectric compoistes were 0.36 to 0.64, and the acoustic impedance of them were 9.8 to 22.7 MRayl. The lateral resonance frequency of 1-3 type piezoelectric composites shifted to high frequency region with decreasing lateral spatial scale.
Keywords
piezo-composite; ultrasonic transducer; PZT; epoxy; electromechanical coupling coefficient; acoustic impedance;
Citations & Related Records
연도 인용수 순위
  • Reference
1 H. L. W. Chan, and J. Unsworth, 'Simple Model for Piezoelectric Ceramic/Polymer 1-3 Composites Used in Ultrasonic Transducer Applications,' IEEE Transations on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. &3, No.4, pp. 434-441, (1989)
2 J. H. Goll, ‘Design of Broad-Band Fluid-Loaded Ultrasonic Transducers,’ IEEE Transations on Sonics and Ultrasonics, Vol.. SU-26, No.6, pp. 385-393, (1979)
3 W. A Smith, ‘The Role of Piezocomposites in Ultrasonic Transducers,’ Ultrasonics Symposium, pp. 755-766, (1989)
4 W. A Smith, ‘Modeling 1-3 Composites Piezoelectrics' Hydrostatic Response’, IEEE Transactions on Ultrasonics, Ferroeiectrics, and Frequency Control, Vol. 40, No. 1, pp. 41-49, (1993)   DOI   ScienceOn
5 T. R. Gururaja, et al., ‘Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part I : Resonant Modes of Vibration of PZT Rod-polymer Composites,’ IEEE Transations on Sonics and Ultrasonics, Vol. SU-32, No.4, pp. 481-400, (1985)
6 H. Jaffe, D. Berlincourt, T. Kinsley, T. M. Lambert, and D. Schwartz, ‘IRE Standards on Piezoelectric Crystals: Measurements of Piezolectric Ceramics,’ Proceedings of the IRE, 61 IRE 14.S1, pp. 1161-1169, (1961)
7 D. C. Certon, N. Felix, E. Lacaze, F. Teston, and F. Padat, ‘Investigation of Cross-Coupling in 1-3 Piezocompoiste Arrays,’ IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 48, No.1, pp. 85-92, (2001)