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Nonlinear dielectric response in piezoelectric materials for underwater transducers

Journal Article


Abstract


  • SONAR transducers based on single crystal lead magnesium niobate-lead titanate (PMNT) have demonstrated improvements over conventional lead zirconate titanate ceramics. Compositional modifications to PMNT have combined the high piezoelectric coefficient (d33 > 2000 pC/N) and electromechanical coupling factor (k33 > 0.90) with the low mechanical losses (QM > 1000) of "hard" piezoelectric ceramics. The dielectric losses of single crystal PMNT have not been investigated as extensively as the mechanical losses but may significantly affect the performance of a device when water loaded. In this work, nonlinearities in the dielectric permittivity and losses have been investigated as a function of applied electric field, measurement frequency, and temperature. It is shown that electromechanically "hard" single crystals offer greater stability of the dielectric properties while maintaining a high permittivity with respect to conventional lead zirconate titanate ceramics. © 2012 American Institute of Physics.

UOW Authors


  •   Sherlock, Nevin P. (external author)
  •   Garten, L M. (external author)
  •   Zhang, Shujun
  •   Shrout, Thomas R. (external author)
  •   Meyer, Richard J. (external author)

Publication Date


  • 2012

Citation


  • Sherlock, N. P., Garten, L. M., Zhang, S. J., Shrout, T. R. & Meyer, R. J. (2012). Nonlinear dielectric response in piezoelectric materials for underwater transducers. Journal of Applied Physics, 112 (12), 124108-1-124108-5.

Scopus Eid


  • 2-s2.0-84881495970

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1982

Has Global Citation Frequency


Start Page


  • 124108-1

End Page


  • 124108-5

Volume


  • 112

Issue


  • 12

Place Of Publication


  • United States

Abstract


  • SONAR transducers based on single crystal lead magnesium niobate-lead titanate (PMNT) have demonstrated improvements over conventional lead zirconate titanate ceramics. Compositional modifications to PMNT have combined the high piezoelectric coefficient (d33 > 2000 pC/N) and electromechanical coupling factor (k33 > 0.90) with the low mechanical losses (QM > 1000) of "hard" piezoelectric ceramics. The dielectric losses of single crystal PMNT have not been investigated as extensively as the mechanical losses but may significantly affect the performance of a device when water loaded. In this work, nonlinearities in the dielectric permittivity and losses have been investigated as a function of applied electric field, measurement frequency, and temperature. It is shown that electromechanically "hard" single crystals offer greater stability of the dielectric properties while maintaining a high permittivity with respect to conventional lead zirconate titanate ceramics. © 2012 American Institute of Physics.

UOW Authors


  •   Sherlock, Nevin P. (external author)
  •   Garten, L M. (external author)
  •   Zhang, Shujun
  •   Shrout, Thomas R. (external author)
  •   Meyer, Richard J. (external author)

Publication Date


  • 2012

Citation


  • Sherlock, N. P., Garten, L. M., Zhang, S. J., Shrout, T. R. & Meyer, R. J. (2012). Nonlinear dielectric response in piezoelectric materials for underwater transducers. Journal of Applied Physics, 112 (12), 124108-1-124108-5.

Scopus Eid


  • 2-s2.0-84881495970

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1982

Has Global Citation Frequency


Start Page


  • 124108-1

End Page


  • 124108-5

Volume


  • 112

Issue


  • 12

Place Of Publication


  • United States