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Title: Dielectric and pyroelectric properties of lead zirconate titanate/polyurethane composties
Authors: Lam, KS
Wong, YW
Tai, LS
Poon, YM
Shin, FG
Issue Date: 1-Oct-2004
Source: Journal of applied physics, 1 Oct, 2004, v. 96, no. 7, p. 3896-3899
Abstract: 0-3 composite ranging between 0 and 3, of ferroelectric ceramic lead zirconate titanate (PZT) and thermoplastic elastomer polyurethane (PU) were fabricated. The pyroelectric and dielectric properties of the hot-pressed thin film samples of various PZT volume fractions were measured. The experimental dielectric permittivities and losses agreed reasonably well with the Bruggeman model. The room temperature pyroelectric coefficients of the composites were found to increase linearly with PZT volume fraction and substantially larger than expected. For example, for a composite with 30% PZT, its pyroelectric coefficient is about 90 μC/m²K at room temperature, which is more than tenfold of a PZT/PVDF composite of the same ceramic volume fraction. We propose a model in which the electrical conductivity of the composite system is taken into consideration to explain the linear relationship and the extraordinarily large pyroelectric coefficients obtained.
Keywords: Lead compounds
Filled polymers
Composite materials
Ferroelectric ceramics
Ferroelectric thin films
Polymer films
Pyroelectricity
Hot pressing
Permittivity
Dielectric losses
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.1787586
Rights: © 2004 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. 96, 3896 (2004) and may be found at http://link.aip.org/link/?jap/96/3896.
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