Obscurants for Infrared Countermeasures II

Abstract

This report describes results of a search for a suitable mid-infrared obscurant. The goal is to identify a material with sufficient extinction, equivalent or superior to brass, which has been demonstrated to provide high extinction but without its toxicity and environmental effects. More than ten materials were initially selected as promising based on results from previous studies or from the bulk spectra or optical constants. These powders were characterized by laboratory extinction using the previously constructed NRL apparatus in which infrared transmission and mass loading are determined for dry powder samples in a flowing gas stream. The average particle sizes were characterized, and the extinction coefficients are compared to calculated values. Of the materials tested, graphite with a nominal 2-micron average particle diameter has the highest mass-extinction coefficient. Results of field test studies of obscurant materials are also reported.

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Document Details

Document Type
Technical Report
Publication Date
Mar 24, 2000
Accession Number
ADA375708

Entities

People

  • A. P. Baronavski
  • H. D. Ladouceur
  • Herbert H. Nelson
  • J. C. Owrutsky

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Ceramic Materials
  • Chemical Synthesis
  • Chemistry
  • Countermeasures
  • Field Tests
  • Graphitic Materials
  • Infrared Countermeasures
  • Materials
  • Materials Laboratories
  • Measurement
  • Military Research
  • Particle Size
  • Refractive Index
  • Silicon Carbide
  • Spectra
  • Titanium Oxides

Readers

  • Atmospheric Remote Sensing.
  • Spectroscopy.
  • Surface Engineering/Surface Coating Technology.