KNNS-BNZH Lead-free 1-3 Piezoelectric Composite for Ultrasonic and Photoacoustic Imaging

KNNS-BNZH Lead-free 1-3 Piezoelectric Composite for Ultrasonic and Photoacoustic Imaging
Title:
KNNS-BNZH Lead-free 1-3 Piezoelectric Composite for Ultrasonic and Photoacoustic Imaging
Other Titles:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Publication Date:
05 May 2019
Citation:
Q. Ke, W. H. Liew, H. Tao, J. Wu and K. Yao, "KNNS-BNZH Lead-Free 1–3 Piezoelectric Composite for Ultrasonic and Photoacoustic Imaging," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 66, no. 8, pp. 1395-1401, Aug. 2019, doi: 10.1109/TUFFC.2019.2914464.
Abstract:
In this paper, lead-free 0.965(K0.45Na0.55) (Nb0.96Sb0.04)O3-0.0375Bi0.5Na0.5Zr0.85Hf0.15O3(KNNS-BNZH)/epoxy 1-3 composite was designed and fabricated with dice-and-fill method. The composite material exhibited a high thickness electromechanical coupling coefficient (kt=0.7), high piezoelectric constant (d33=350 pC N-1), relatively low mechanical quality factor (Qm=5), and relatively low acoustic impedance. An ultrasonic transducer with a center frequency of 5 MHz was produced based on the 1-3 KNNS-BNZH/epoxy composite, showing a broad bandwidth of 80% (-6 dB) and two-way insertion loss of -30 dB. Ultrasonic and photoacoustic images were further demonstrated. The outstanding performance of the 1-3 KNNS-BNZH/epoxy composite transducer competitive to PZT-based transducers suggests that the lead-free material can serve as a promising alternative to Pb-based piezoelectric materials for ultrasonic applications.
License type:
PublisherCopyrights
Funding Info:
This project is supported by National Research Foundation Competitive Research Programme of Singapore, NRF-CRP15-2015-04, (IMRE/16-9P1122) and National Science Foundation of China (NSFC No. 51722208 and 51332003).
Description:
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
ISSN:
0885-3010
1525-8955
Files uploaded: