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Dielectric and ferroelectric properties of 1-3 composites containing thin PZT-fibers

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6 Author(s)
W. Watzka ; Fraunhofer-Inst. fur Silicatforschung, Wurzburg, Germany ; S. Seifert ; H. Scholz ; D. Sporn
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PbZr0.53Ti0.47O3 (PZT)-fibers were prepared by a sol-gel route and appropriate thermal treatment. The sintered fibers show negligible porosity of about 100 nm in diameter and a narrow grain size distribution, the grain sizes ranging from 1 to 5 μm depending on the sintering conditions. PZT-fiber/epoxy composites with 1-3 connectivity were prepared. Fiber volume fractions were adjusted from 20 to 70 vol.-%. Ferroelectric properties of composites with thicknesses between 0.05 and 0.5 mm are about 10 μC/cm2 for the remanent polarization and about 15 kV/mm for the coercive field. During longtime cycling of up to 106 cycles Pr nearly remains constant, Ec increases by 50%. A coupling coefficient kt of up to 55% was measured. Perpendicular to the fiber direction a Pr of 0.8 μC/cm2 and an Ec of 2 kV/mm were measured

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