Abstract
A high-frequency (∼60 MHz) ultrasonic transducer with a [001]-oriented 0.27Pb(In1/2Nb1/2)O3–0.45Pb(Mg1/3Nb2/3)O3–0.28PbTiO3 (PIN–PMN–PT) piezoelectric single crystal as an active element has been fabricated and characterized. The poled PIN–PMN–PT single crystal has thickness mode electromechanical coefficient k t of 0.56 and piezoelectric constant d 33 of 1550 pC/N. The −6 dB bandwidth of the transducer is 73 % and the insertion loss at its centre frequency is −20 dB. With the study as a function of temperature, the PIN–PMN–PT transducer shows better thermal stability than the binary single crystal transducer. Furthermore, the transducer was evaluated using a 30-μm aluminum wire phantom image, in which the −6 dB axial and lateral resolutions are found to be 26 μm and 127 μm, respectively. Ultrasonic images of fish eyes were obtained with the 60-MHz transducer. It is shown that the high-sensitivity transducer can produce the images with high signal-to-noise ratio and good contrast.
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This work was supported by the Hong Kong Innovative Technology Council (Project No. ITS/044/09 FP) and the Centre for Smart Materials of the Hong Kong Polytechnic University.
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Chen, Y., Lam, K.H., Zhou, D. et al. High-frequency PIN–PMN–PT single crystal ultrasonic transducer for imaging applications. Appl. Phys. A 108, 987–991 (2012). https://doi.org/10.1007/s00339-012-7009-0
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DOI: https://doi.org/10.1007/s00339-012-7009-0