Dielectric and pyroelectric properties of lead zirconate titanate/polyurethane composites

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1787586· OSTI ID:20662087

Lam, K S; Wong, Y W; Tai, L S; Poon, Y M; Shin, F G ^[1]

---

1. Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Hong Kong (China)

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 {mu}C/m{sup 2}K 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.

• OSTI ID: 20662087
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 96; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
COMPOSITE MATERIALS
DIELECTRIC MATERIALS
ELECTRIC CHARGES
ELECTRIC CONDUCTIVITY
HOT PRESSING
PERMITTIVITY
POLARIZATION
POLYURETHANES
PYROELECTRIC EFFECT
PZT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
THERMOPLASTICS
THIN FILMS