Dielectric properties of 65PMN-35PT/P(VDF-TrFE) 0-3 composites

Kwok Ho Lam, H. L.W. Chan, H. S. Luo, Q. R. Yin, Z. W. Yin, C. L. Choy

Research output: Journal article publicationConference articleAcademic researchpeer-review

33 Citations (Scopus)

Abstract

Lead magnesium niobate-lead titanate (PMN-PT with 35 mol.% PT) single crystal powder has been incorporated into a polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE) 70/30 mol.%) copolymer matrix to form 0-3 composites. With 65/35 mol.% composition, PMN-PT has high piezoelectric properties as a result of the enhanced polarizability arising from the coupling between two equivalent energy states. P(VDF-TrFE) ferroelectric copolymer films can be poled to give piezoelectric and pyroelectric performance without prior mechanical stretching. The composites were prepared using solvent casting to disperse the single crystal powder homogeneously in the matrix. Composites with PMN-PT volume fraction φ ranging from 0.05 to 0.4 were fabricated using a hot-press method. The relative permittivity and pyroelectric coefficients of the composites were measured as a function of φ. Good agreement has been obtained between the theoretical and experimental values. Under the same poling condition, the composites have higher pyroelectric coefficient than the pure copolymer films. Hysteresis measurements reveal that the remanent polarization of composites increases as φ increases.
Original languageEnglish
Pages (from-to)792-797
Number of pages6
JournalMicroelectronic Engineering
Volume66
Issue number1-4
DOIs
Publication statusPublished - 1 Apr 2003
EventIUMRS-ICEM 2002 - Xi an, China
Duration: 10 Jun 200214 Jun 2002

Keywords

  • Composite
  • Hysteresis
  • Lead magnesium niobate-lead titanate
  • Piezoelectric
  • Polyvinylidene fluoride-trifluoroethylene copolymer
  • Pyroelectric

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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