High-frequency PIN-PMN-PT single crystal ultrasonic transducer for imaging applications

Chen, Y., Lam, K.H. , Zhou, D., Cheng, W. F., Dai, J. Y., Luo, H. S. and Chan, H. L. W. (2012) High-frequency PIN-PMN-PT single crystal ultrasonic transducer for imaging applications. Applied Physics A: Materials Science and Processing, 108(4), pp. 987-991. (doi: 10.1007/s00339-012-7009-0)

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Chen, Y., Lam, K.H., Zhou, D., Cheng, W. F., Dai, J. Y., Luo, H. S., and Chan, H. L. W.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Applied Physics A: Materials Science and Processing
• Publisher: Springer
• ISSN: 0947-8396
• ISSN (Online): 1432-0630