Fabrication and performance of endoscopic ultrasound radial arrays based on PMN-PT single crystal/epoxy 1-3 composite

Dan Zhou, Kwok Fung Cheung, Yan Chen, Sien Ting Lau, Qifa Zhou, K. Kirk Shung, Hao Su Luo, Jiyan Dai, Helen Lai Wa Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)

Abstract

In this paper, 0.7Pb(Mg1/3Nb2/3)O3-0. 3PbTiO3(PMN-PT) single crystal/epoxy 1/3 composite was used as the active material of the endoscopic ultrasonic radial array transducer, because this composite exhibited ultrahigh electromechanical coupling coefficient (kt= 0.81%), very low mechanical quality factor (Qm= 11) and relatively low acoustic impedance (Zt= 12 MRayls). A 6.91 MHz PMN-PT/epoxy 1/3 composite radial array transducer with 64 elements was tested in a pulseecho response measurement. The -6-dB bandwidth of the composite array transducer was 102%, which was ∼30% larger than that of traditional lead zirconate titanate array transducer. The two-way insertion loss was found to be -32.3 dB. The obtained results show that this broadband array transducer is promising for acquiring high-resolution endoscopic ultrasonic images in many clinical applications.
Original languageEnglish
Article number5716465
Pages (from-to)477-484
Number of pages8
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume58
Issue number2
DOIs
Publication statusPublished - 1 Feb 2011

Keywords

  • Acoustics
  • Couplings
  • Crystals
  • Frequency measurement
  • Impedance
  • Transducers

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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