Composite Pyroelectric Materials.

Abstract

Pyroelectric materials develop electric charge with temperature change. They are used in thermal device applications such as surveillance, burglar alarms and vidicon night-image systems. Greater pyroelectric sensitivity is needed for many vidicon applications. We are exploring ways of increasing the pyroelectric figure-of-merit (pyroelectric coefficient/permittivity) through the use of composite materials. In this report we discuss the results of work carried out at Penn State and at the North American Philips Laboratory (Dr. J. Dougherty and Dr. W. Smith). The design principles and experimental data for a model system are described in the section entitled Pyroelectric PZT composites. For PZT-Spurrs composites with parallel connectivity, the pyroelectric figure-of-merit is more than five times larger than for a poled PZT ceramic.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1979
Accession Number
ADA083726

Entities

People

  • A. S. Bhalla
  • Robert E. Newnham

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Coefficients
  • Composite Materials
  • Crystals
  • Dielectric Permittivity
  • Dielectric Properties
  • Electrical Conductivity
  • Electromagnetic Fields
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Phase Transformations
  • Polymer Matrix Composites
  • Thermal Conductivity
  • Thermal Expansion
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Military History