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Development of ultra-fine scale piezoelectric fibers for use in high frequency 1-3 transducers

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3 Author(s)
R. J. Meyer ; Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA ; T. R. Shrout ; S. Yoshikawa

Lanthanum substituted lead zirconate titanate (PLZT) fine scale piezoelectric fibers (<60 μm) were fabricated for use in high frequency ultrasonic imaging transducers. Single fiber filaments, ranging from 10 to 60 μm in diameter, were produced in a continuous fashion using metal alkoxide sol-gel technology. Microstructural and electrical characteristics of these fibers were determined under different pyrolysis conditions to obtain crack free, dense fibers. Final grain sizes were 1-1.5 microns at sintering temperatures of 1200°C for 30 minutes. Permittivities for PLZT fibers improved to 1200 by using CO, H2O and N2 atmospheres during pyrolysis to control organic burnout. PLZT compositions were incorporated into 1-3 type fiber/polymer composites. Preliminary data on 1-3 composites made using these fibers confirm single fiber dielectric constant determinations and have ceramic volume fractions up to 40%

Published in:

Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on  (Volume:2 )

Date of Conference:

18-21 Aug 1996