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Proceedings Paper

Electrostriction of composites of polyurethane (PU) with ferroelectric lead zirconate titanate (PZT) ceramic particles
Author(s): Yuen-Wah Wong; Chun-Xiao Liu; Liang-Shiang Tai; Franklin G. Shin
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Paper Abstract

Electrostrictive composites of thermoplastic elastomer polyurethane (PU) and the ferroelectric lead zirconate titanate (PZT) of various volume fractions have been prepared by hot-roller miller. X-ray diffraction results and SEM micrographs showed that the ceramic crystallized in the ferroelectric phase and was dispersed uniformly in the elastomer. The elastic modulus and dielectric permittivity increased with PZT volume fractions. For composites of low PZT volume fraction, negative electrostrictive strain (contraction) was observed. As the PZT volume fraction increased to more than 6%, the composites exhibited a switching characteristic when the applied electric field was increased to a critical value. The critical electric fields decreased with increasing PZT volume fractions. This effect can be explained as the resultant of the electrostriction of PU and polarization reversal of the PZT at high field. This interesting property of the PU/PZT composite will lead to some switching actuations for high electric field applications.

Paper Details

Date Published: 16 July 2001
PDF: 6 pages
Proc. SPIE 4329, Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices, (16 July 2001); doi: 10.1117/12.432687
Show Author Affiliations
Yuen-Wah Wong, Hong Kong Polytechnic Univ. (Hong Kong)
Chun-Xiao Liu, Hong Kong Polytechnic Univ. (Hong Kong)
Liang-Shiang Tai, Hong Kong Polytechnic Univ. (Hong Kong)
Franklin G. Shin, Hong Kong Polytechnic Univ. (Hong Kong)

Published in SPIE Proceedings Vol. 4329:
Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices
Yoseph Bar-Cohen, Editor(s)

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