Applied Physics A

, Volume 80, Issue 1, pp 105–110 | Cite as

Piezoelectric PMN-PT fibre hydrophone for ultrasonic transducer calibration

  • S.T. LauEmail author
  • K.H. Lam
  • H.L.W. Chan
  • C.L. Choy
  • H.S. Luo
  • Q.R. Yin
  • Z.W. Yin


A newly developed ceramic fibre hydrophone with an active element as small as 0.25 mm in diameter is described in this work. Lead magnesium niobate-lead titanate (PMN-PT) ceramic fibre with a nominal composition of 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 was fabricated by an extrusion method. PMN-PT single crystals were ground to a powder form and then mixed with poly(acrylic) acid to form a homogenous slurry. The fibre was extruded by pressing the slurry through a spinneret and then sintering at 1250 °C for crystallization. The electrical characteristics of the PMN-PT fibre were evaluated by measuring the relative permittivity and the impedance spectrum. A piezoelectric PMN-PT fibre hydrophone was fabricated and its sensitivity, angular response, and spatial resolution were evaluated. The fibre hydrophone provides good spatial resolution, angular response and receiving sensitivity.


Crystallization Titanate Active Element Impedance Spectrum Nominal Composition 
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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • S.T. Lau
    • 1
    Email author
  • K.H. Lam
    • 1
  • H.L.W. Chan
    • 1
  • C.L. Choy
    • 1
  • H.S. Luo
    • 2
  • Q.R. Yin
    • 2
  • Z.W. Yin
    • 2
  1. 1.Department of Applied Physics and Materials Research CentreThe Hong Kong Polytechnic UniversityHong KongChina
  2. 2.Shanghai Institute of CeramicsThe Chinese Academy of SciencesShanghaiChina

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