Title :
Single crystal PMN-0.33PT/epoxy 1-3 composites for ultrasonic transducer applications
Author :
Cheng, Kei C. ; Chan, Helen L W ; Choy, Chung L. ; Yin, Qingrui ; Luo, Hasou ; Yin, Zhiwen
Author_Institution :
Dept. of Appl. Phys., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
Lead magnesium niobate-lead titanate 0.67Pb (Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.33PbTiO/sub 3/ (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 /spl sim/61% and an insertion loss of -14 dB.
Keywords :
filled polymers; hydrophones; lead compounds; ultrasonic transducers; 2.4 MHz; PMN-PT single crystals; PMN-PbTiO/sub 3/; PbMgO3NbO3-PbTiO3; electromechanical properties; resonance technique; thickness electromechanical coupling coefficients; ultrasonic transducer applications; volume fractions; Bandwidth; Crystals; Insertion loss; Magnesium; Material properties; Niobium; Resonance; Titanium compounds; Ultrasonic transducers; Ultrasonic variables measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2003.1235328
