Processing and characterization of piezoelectric 0-3 PZT/LCT/PA composites
article
PZT/LCT/PA (lead zirconate titanate Pb(Zr<sub>1-x</sub>Ti <sub>x</sub>)O<sub>3</sub>/Liquid crystalline thermosets/polyamide) composites of 0-3 connectivity were fabricated by hot-pressing. Commercially available PZT powder was calcined at different temperatures for the optimization of the composite properties. The phase transition during calcination of the powder was studied by x-ray diffraction and the particle size by light scattering and scanning electron microscopy. The relative permittivity ε<sub>r</sub>, piezoelectric charge constant d<sub>33</sub>, conductivity σ and elastic modulus E of the composites were found to increase with increasing ceramic volume fraction. The obtained d<sub>33</sub> and g<sub>33</sub> values of this newly developed PZT/LCT/PA composite with 50 vol% PZT using a low poling voltage of 60 kV cm<sup>-1</sup> and poling time of 30min are 42 pCN<sup>-1</sup> and 65mVmN<sup>-1</sup>, respectively, which are high values for this volume fraction in comparison with the other 0-3 composites reported. Good agreement was found between the experimental data of relative permittivity and piezoelectric constants with several theoretical models (Jayasundere, Yamada and Lichtenecker) of 0-3 composites. In order to assess the correlation of the experimental data with the theoretical models, the experimental data obtained from PZT/PA composites were also included.
TNO Identifier
425158
ISSN
00223727
Source
Journal of Physics D: Applied Physics, 43(42)
Article nr.
425402
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