An investigation of the electrostrictive property of PZT/polyurethane particulate composites

Wong, YW; Tai, Ls S.; Liu, Cx X.; Shin, Franklin G.

doi:10.1080/00150190108008547

Cited by 5 publications

(1 citation statement)

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“…Polymers of large electrostriction as matrix material have also attracted attention in recent years, as in the lead zirconate titanate ͑PZT͒/ polyurethane ͑PU͒ composite. [1][2][3][4][5] In a previous article, 5 the induced strain of initially polarized PZT/PU composites subjected to an increasing electric field in the reversed direction had been measured. It has been reported that the PZT/PU composites with PZT volume fraction larger than 6% exhibited a switching characteristic when the applied electric field was increased to a critical value, and the critical electric fields decreased with increasing PZT volume fractions.…”

Section: Introductionmentioning

confidence: 99%

Effect of interfacial charge on polarization switching of lead zirconate titanate particles in lead zirconate titanate/polyurethane composites

Wong

Shin

2002

Journal of Applied Physics

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A simple model has been developed to include the effect of accumulated charge at the matrixinclusion interface in ferroelectric 0-3 composites on the polarization reversal characteristics. This is used to illustrate a recent set of experimental results on initially polarized lead zirconate titanate ͑PZT͒/polyurethane ͑PU͒ composites subjected to an increasing electric field in the reversed direction. Estimations based on previous models ͓e.g., T. Furukawa, K. Fujino, and E. Fukada, Jpn. J. Appl. Phys. 15, 2119 ͑1976͔͒ suggest that the local electric field in the PZT particles at switching was an order smaller than the coercive field of PZT. By introducing the effect of interfacial charge and assuming that initially the charge has a magnitude which balances the depolarization field in the polarized PZT inclusions, theoretical calculation based on this image shows that the phenomenon of PZT switching at low fields can be explained as a manifestation of the depletion of interfacial charge which can no longer stabilize the original polarization.

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Section: Introductionmentioning

confidence: 99%