Lead-free piezoelectric single crystal based 1-3 composites for ultrasonic transducer applications

Zhou, D., Lam, K. H. , Chen, Y., Zhang, Q., Chiu, Y. C., Luo, H., Dai, J. and Chan, H. L. W. (2012) Lead-free piezoelectric single crystal based 1-3 composites for ultrasonic transducer applications. Sensors and Actuators A: Physical, 182, pp. 95-100. (doi: 10.1016/j.sna.2012.05.030)

Abstract

In this work, lead-free 1–3 composites based on piezoelectric 0.947Na0.5Bi0.5TiO3–0.053BaTiO3 (NBT–0.053BT) single crystal and epoxy are fabricated for ultrasonic transducer applications by a modified dice-and-fill method. Excellent properties for ultrasonic transducer applications have been achieved, such as high electromechanical coupling coefficient (kt = 73%), lower acoustic impedance (Z = 16 MRayl) and moderate dielectric constant. Based on this lead-free piezoelectric single crystal composite, single-element ultrasonic transducer and linear array have been fabricated and characterized. Both types of transducers exhibit similar performance with broad bandwidth of exceeding 100%. The promising results show that these lead-free composites have the potential to be used for high-performance ultrasonic transducers.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Zhou, D., Lam, K. H., Chen, Y., Zhang, Q., Chiu, Y. C., Luo, H., Dai, J., and Chan, H. L. W.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Sensors and Actuators A: Physical
• Publisher: Elsevier
• ISSN: 0924-4247
• ISSN (Online): 1873-3069