Ferroelectric Hysteresis Effects in Poly (Vinylidene Fluoride) Films.

Abstract

Investigations of the piezoelectric response of biaxially oriented poly (vinylidene fluoride) films subjected to a series of static positive and negative poling fields produces a hysteresis curve for d31 and e31 showing the ferroelectric character of phase IV. Examination of changes in the crystalline regions, using differential scanning calorimetry and x-ray methods, of films cycled (statically) through large positive and negative poling fields, provides insight into the switching mechanisms of both phase I and phase IV. The experimental results show a cyclic broadening and narrowing of the endothermic melting peaks as the film polarization is switched. Cyclic changes in the intensities of the phase I (110) (200) and phase II (or phase IV) (100), (020), and (110) reflections are also observed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1980
Accession Number
ADA083650

Entities

People

  • B. A. Newman
  • C. H. Yoon
  • J. I. Scheinbeim
  • K. D. Pae

Organizations

  • Rutgers University–New Brunswick

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Crystal Structure
  • Crystals
  • Diffraction
  • Diffractometers
  • Electrical Measurement
  • High Pressure
  • High Temperature
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Phase
  • Phase Transformations
  • Time Dependence
  • Transitions
  • X Rays
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.