Research on High-Specific-Heat Dielectrics

Abstract

A large amount of experimentation has been performed on ceramic samples of zinc chromite and cadmium chromite prepared under new conditions of doping, stress, purity, and particle size. No structures in the specific heats of these spinels are induced above 15 K by wide variations in one or all of these conditions. Under various doping conditions, the specific heat peak in cadmium chromite can be sharpened, broadened, or eliminated, but not split. In contrast, the specific heat peak in zinc chromite is easily spit into two components by all dopants studied. Calorimetric, magnetic susceptibility, and EPR measurements are in basic agreement in characterizing these effects. (JES)

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Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1990
Accession Number
ADA221215

Entities

People

  • W. N. Lawless

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Synthesis
  • Crystal Structure
  • Dielectrics
  • Heat Energy
  • Latent Heat
  • Magnetic Fields
  • Magnetic Properties
  • Materials Laboratories
  • Materials Processing
  • Materials Testing
  • Measurement
  • Phase Diagrams
  • Phase Transformations
  • Thermodynamic Properties
  • Thermodynamics
  • Transition Temperature

Readers

  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.