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Updated: Aug 30, 2026
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Published on: March 6, 2016
Single crystal PMN-0.33PT/epoxy 1-3 composites for ultrasonic transducer applications
Kei C Cheng1, Helen L W Chan, Chung L Choy
1Department of Applied Physics and Centre for Smart Materials, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong, China. apahlcha@plyu.edu.hk
Abstract:
Lead magnesium niobate-lead titanate 0.67Pb (Mg(1/3)Nb(2/3))O3-0.33PbTiO3 (PMN-0.33PT, abbreviated as PMN-PT) single crystals were used to fabricate PMN-PT/epoxy 1-3 composites with different volume fractions of PMN-PT ranging from 0.4 to 0.8. The electromechanical properties of the 1-3 composites were determined by the resonance technique. Theoretical modeling of the 1-3 composites matched quite well with the measured material properties. It was demonstrated that the thickness electromechanical coupling coefficients of the composites could reach as high as 0.8. A 2.4 MHz plane ultrasonic transducer was fabricated using a PMN-PT/epoxy 1-3 composite with 0.37 volume fraction of PMN-PT. It shows a -6 dB bandwidth of approximately 61% and an insertion loss of -14 dB.
