Apparatus for Measuring Emittance and Absorptance and Results for Selected Materials

Abstract

An apparatus for measuring hemispherical total emittance and normal solar absorptance is described. A steady-state heat balance method is used in making measurements at specimen temperatures between 280 deg and 600 deg K. A carbon-arc solar simulator that is used in the absorptance measurements is described. A description of a blackbody normal absorptance standard is given. Results are given for the following surfaces: four plasma-sprayed ceramics, zirconium silicate, strontium titanate, calcium titanate, and barium titanate; two ceramics applied by the Rokide process, Rokide MA and Rokide ZS; anodized aluminum, uncoated and electrophoretically blackened; and a white epoxy-based paint. The accuracy of the apparatus is discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1965
Accession Number
ADA396246

Entities

People

  • Henry B. Curtis
  • Ted W. Nyland

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Barium Titanates
  • Ceramic Coatings
  • Ceramic Materials
  • Coatings
  • Control Systems
  • Energy
  • Equations
  • Heat Shields
  • Heat Transfer
  • Heating Elements
  • Materials
  • Measurement
  • Power Measurement
  • Radiation
  • Solar Energy
  • Space Systems

Fields of Study

  • Physics

Readers

  • Surface Engineering/Surface Coating Technology.
  • Thermal Physics or Thermal Science.