Piezoelectric PMN-PT fibre hydrophone for ultrasonic transducer calibration

S. T. Lau, Kwok Ho Lam, H. L.W. Chan, C. L. Choy, H. S. Luo, Q. R. Yin, Z. W. Yin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


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)O3-0.35PbTiO3was 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.
Original languageEnglish
Pages (from-to)105-110
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Issue number1
Publication statusPublished - 1 Jan 2005

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science


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