High-frequency ultrasonic transducer based on lead-free BSZT piezoceramics

S. T F Lee, Kwok Ho Lam, Xuming Zhang, H. L W Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)

Abstract

This paper describes the fabrication and evaluation of a high-frequency (40 MHz) transducer based on lead-free piezoceramics for ultrasonic imaging. The transducer with an aperture size of 0.9 mm has been fabricated using barium strontium zirconate titanate ((Ba0.95Sr0.05)(Zr0.05Ti0.95)O3, abbreviated as BSZT) ceramics. The lead-free BSZT has a piezoelectric d33coefficient of 300 pC/N and an electromechanical coupling factor ktof 0.45. High-frequency ultrasound transducers were fabricated and a bandwidth of 76.4% has been achieved with an insertion loss of -26 dB. Applications in high resolution biological and medical imaging could be possible with this lead-free material.
Original languageEnglish
Pages (from-to)811-814
Number of pages4
JournalUltrasonics
Volume51
Issue number7
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • High-frequency transducer
  • Lead-free

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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