Abstract
High-frequency (25 MHz) ultrasonic transducers with Na0.5Bi0.5TiO3-BaTiO3(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 kt 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.
Original language | English |
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Article number | 5611708 |
Pages (from-to) | 2601-2604 |
Number of pages | 4 |
Journal | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |
Volume | 57 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2010 |
ASJC Scopus subject areas
- Instrumentation
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering