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|Title:||Electrostriction of lead zirconate titanate/polyurethane composites|
Shin, Franklin G.
Particle reinforced composites
|Publisher:||American Institute of Physics|
|Source:||Journal of applied physics, 15 May 2005, v. 97, no. 10, 104112, p. 1-6.|
|Abstract:||Electrostriction of a ferroelectric inclusion/nonferroelectric matrix composite system was studied. The samples were prepared by blending the lead zirconate titanate (PZT) particles with the thermoplastic polyurethane through extrusion and subsequently by hot pressing. Quasistatic cyclic electric fields were applied across the samples while strains and currents were monitored simultaneously. It was found that the electrostriction of the composites depended on the applied electric field in a hysteretic manner. In particular at the high-field regime, the samples exhibited a reversal in the electrostrictive strain. This switching effect occurred at a critical field which was inversely proportional to the PZT content. An associated increase in the displacement current with the critical field was also observed. It indicates that the switching in strain of the composites was mainly due to the flipping of the PZT dipoles in the nonferroelectric polymer matrix. A model was developed for describing the lectrostriction behavior of this composite system and the calculated results are comparable to the experimental curves. The success of this theoretical model encourages its application further to the ferroelectric–ferroelectric composite systems.|
|Rights:||© 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in K. S. Lam et al., J. Appl. Phys. 97, 104112 (2005) and may be found at http://link.aip.org/link/?jap/97/104112.|
|Appears in Collections:||AP Journal/Magazine Articles|
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