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.
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