Design of low-loss 1-3 piezoelectric composites for high-power transducer applications

Hyeong Jae Lee, Shujun Zhang

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Lead zirconate titanate (PZT)/polymer 1-3 composites have improved electromechanical properties compared with monolithic counterparts, but possess a low mechanical quality factor, limiting their use in high-power transducer applications. The goal of this work was to improve the mechanical quality factor of 1-3 PZT/polymer composites by optimizing the polymer materials. Theoretical analysis and modeling were performed for optimum composite design and various polymers were prepared and characterized. 1-3 piezocomposites were constructed and their electromechanical properties were experimentally determined. The results demonstrated that the composites with high-thermal-conductivity polymers generally have degraded electromechanical properties with significantly decreased mechanical quality factors, whereas the composites filled with low-loss and low-moduli polymers were found to have higher mechanical quality factors with higher electromechanical coupling factors: Q m ∼ 200 and k t ∼ 0.68 for PZT4 composites; Q m ∼ 400 and k t ∼ 0.6 for PZT8 composites. The improved mechanical quality factor of 1-3 piezocomposites may offer improved performance and thermal stability of transducers under high-drive operation.

Original languageEnglish (US)
Article number6306017
Pages (from-to)1969-1975
Number of pages7
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Volume59
Issue number9
DOIs
StatePublished - 2012

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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