Lead-free piezoelectric single crystal based 1-3 composites for ultrasonic transducer applications

Dan Zhou, Kwok Ho Lam, Yan Chen, Qinhui Zhang, Yat Ching Chiu, Haosu Luo, Jiyan Dai, Helen Lai Wa Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

43 Citations (Scopus)

Abstract

In this work, lead-free 1-3 composites based on piezoelectric 0.947Na0.5Bi0.5TiO3-0.053BaTiO3(NBT-0.053BT) single crystal and epoxy are fabricated for ultrasonic transducer applications by a modified dice-and-fill method. Excellent properties for ultrasonic transducer applications have been achieved, such as high electromechanical coupling coefficient (kt= 73%), lower acoustic impedance (Z = 16 MRayl) and moderate dielectric constant. Based on this lead-free piezoelectric single crystal composite, single-element ultrasonic transducer and linear array have been fabricated and characterized. Both types of transducers exhibit similar performance with broad bandwidth of exceeding 100%. The promising results show that these lead-free composites have the potential to be used for high-performance ultrasonic transducers.
Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalSensors and Actuators, A: Physical
Volume182
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • 1-3 composite
  • Lead-free
  • NBT-BT single crystal
  • Ultrasonic transducer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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