| Autor: |
Bradley LW; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30318 USA., Yaras YS; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30318 USA., Karahasanoglu B; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30318 USA., Atasoy B; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30318 USA., Levent Degertekin F; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30318 USA. |
| Jazyk: |
angličtina |
| Zdroj: |
IEEE sensors journal [IEEE Sens J] 2023 Apr 01; Vol. 23 (7), pp. 6672-6679. Date of Electronic Publication: 2023 Mar 06. |
| DOI: |
10.1109/jsen.2023.3251030 |
| Abstrakt: |
Low-temperature, flexible, 0-3 composite piezoelectric materials can decrease the size, cost, and complexity of high-frequency acoustic devices on temperature sensitive substrates such as those in catheter based ultrasonic devices and acoustooptic sensors. In this paper, the application of low-temperature 0-3 connected composite thick films in flexible, non-planar, high frequency ultrasonic devices is reported. A flexible high-frequency ultrasound transducer and an acousto-optic radio-frequency (RF) field sensor are demonstrated utilizing PZT-based composite thick films. Flexible composite films have been fabricated with thicknesses between 20-100μm utilizing screen-printing, stencil-printing, and dip-coating techniques. Composite films' piezoelectric d 33 coefficient is measured, with results between 35-43 pC/N. Ultrasonic transducers utilizing these films demonstrate broadband acoustic response. A composite transducer is fabricated on flexible polyimide and wrapped around a 3mm catheter. Pulse-echo experiments demonstrate viability of these films as both as an actuator and a sensor in flexible devices. The composite material is further dip-coated onto an optical fiber Bragg grating to form a flexible acousto-optic RF field sensor. The sensor demonstrates RF field sensing in the 20-130 MHz range. The results from these experiments indicate significant potential for future flexible, high frequency ultrasonic devices utilizing low temperature 0-3 composite piezoelectric materials on temperature sensitive substrates. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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