High-frequency ultrasonic transducer fabricated with lead-free piezoelectric single crystal

High-frequency (25 MHz) ultrasonic transducers with Na 0.5 Bi 0.5 TiO 3 -BaTiO 3 (NBT-BT) lead-free piezoelectric single crystal as the active elements are fabricated and characterized. The impedance measurement reveals that the poled [001]-oriented NBT-BT single crystal exhibits a high thickness el...

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Veröffentlicht in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2010-11, Vol.57 (11), p.2601-2604
Hauptverfasser: Yan Chen, Xiang Ping Jiang, Hao Su Luo, Ji Yan Dai, Chan, H L W
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container_issue 11
container_start_page 2601
container_title IEEE transactions on ultrasonics, ferroelectrics, and frequency control
container_volume 57
creator Yan Chen
Xiang Ping Jiang
Hao Su Luo
Ji Yan Dai
Chan, H L W
description High-frequency (25 MHz) ultrasonic transducers with Na 0.5 Bi 0.5 TiO 3 -BaTiO 3 (NBT-BT) lead-free piezoelectric single crystal as the active elements are fabricated and characterized. The impedance measurement reveals that the poled [001]-oriented NBT-BT single crystal exhibits a high thickness electromechanical coefficient k t of 0.52 and a low clamped dielectric constant of 80. The -6-dB bandwidth of the transducer is 46.16% and the insertion loss at the center frequency is -31.89 dB. The good performance of the transducer indicates that the NBT-BT single crystal would be a promising lead-free material for ultrasonic transducer applications.
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source IEEE Xplore
subjects Acoustics
Active control
Bandwidth
Crystals
Dielectric constant
Exact sciences and technology
Ferroelectric materials
Frequency measurement
Fundamental areas of phenomenology (including applications)
Noise levels
Physics
Piezoelectricity
Single crystals
Transducers
Transduction
acoustical devices for the generation and reproduction of sound
Ultrasonic transducers
title High-frequency ultrasonic transducer fabricated with lead-free piezoelectric single crystal
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