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Miniature ultrasound transducer incorporating Sm-PMN-PT 1-3 composite

Zhang, J., Bao, G., Gao, W., Lin, R., Yang, F. and Lam, K.-H. (2024) Miniature ultrasound transducer incorporating Sm-PMN-PT 1-3 composite. Journal of Composites Science, 8(3), 80. (doi: 10.3390/jcs8030080)

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Abstract

Piezoelectric 1-3 composite materials have become extensively utilized in diagnostic ultrasound transducers owing to their high electromechanical coupling coefficient, low acoustic impedance, and low dielectric loss. In this study, Sm-doped PMN-PT ceramic/epoxy 1-3 composite with a ceramic volume fraction of 60% is fabricated by the dice-and-fill method, resulting in a high piezoelectric constant (650 pC/N) and clamped dielectric constant (2350). Utilizing the exceptionally high clamped dielectric constant, a low-frequency (12.4 MHz) ultrasound transducer is developed with a miniature aperture size (0.84 mm × 0.84 mm), exhibiting a −6 dB bandwidth of 70% and an insertion loss of −20.5 dB. The imaging capability of the miniature composite transducer is validated through both phantom and ex vivo imaging. The satisfactory results indicate that Sm-doped ceramic/epoxy composites possess significant potential for miniature devices in biomedical imaging applications.

Item Type:Articles
Additional Information:The authors gratefully acknowledge support from the Hong Kong Research Impact Fund (R5029-19) and the Hong Kong General Research Fund (15220920).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lam, Dr Koko
Authors: Zhang, J., Bao, G., Gao, W., Lin, R., Yang, F., and Lam, K.-H.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Composites Science
Publisher:MDPI
ISSN:2504-477X
ISSN (Online):2504-477X
Published Online:22 February 2024
Copyright Holders:Copyright © 2024 by the authors
First Published:First published in Journal of Composites Science 8(3):80
Publisher Policy:Reproduced under a Creative Commons licence

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