Accession Number:

AD0270454

Title:

THERMAL RADIATION PROPERTIES OF MATERIALS

Descriptive Note:

Technical rept. for Jul 1959-Sep 1960

Corporate Author:

CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s):

Report Date:

1961-06-01

Pagination or Media Count:

122.0

Abstract:

Methods are described for measurement of total normal emittance, in air, for temperatures up to 2500 deg F for normal spectral reflectance, in air, at low temperature for wavelengths from 0.30 to 25 microns and in air, at 1000 deg F for wavelengths from 1 to 25 microns. Results are given for 20 samples of different materials and the measured total emittances are generally within 5 of values predicted from reflectance measurements. Reflectances were measured as a function of angle for wavelengths of the order of 1 micron, to give absorptances as a function of angle of incidence that are useful in the appraisal of solar irradiation. A spectral emittance unit is described and the preliminary results for samples at 1400 deg F show general agreement with measured values of spectral reflectance.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Coatings, Colorants and Finishes
  • Metallurgy and Metallography
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE