Single crystal PMN-0.33PT/epoxy 1-3 composites for ultrasonic transducer applications

Kei C Cheng; Helen L W Chan; Chung L Choy; Qingrui Yin; Hasou Luo; Zhiwen Yin

doi:10.1109/tuffc.2003.1235328

Single crystal PMN-0.33PT/epoxy 1-3 composites for ultrasonic transducer applications

IEEE Trans Ultrason Ferroelectr Freq Control. 2003 Sep;50(9):1177-83. doi: 10.1109/tuffc.2003.1235328.

Authors

Kei C Cheng¹, Helen L W Chan, Chung L Choy, Qingrui Yin, Hasou Luo, Zhiwen Yin

Affiliation

¹ Department of Applied Physics and Centre for Smart Materials, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong, China. [email protected]

PMID: 14561033
DOI: 10.1109/tuffc.2003.1235328

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.