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

Yan Chen, Xiang Ping Jiang, Hao Su Luo, Ji Dai, Helen L.W. Helen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

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 languageEnglish
Article number5611708
Pages (from-to)2601-2604
Number of pages4
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume57
Issue number11
DOIs
Publication statusPublished - 1 Nov 2010

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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