THERMAL RADIATION PROPERTIES OF MATERIALS
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1961
- Accession Number
- AD0270454
Entities
People
- R. A. Seban
- R. E. Rolling
Organizations
- University of California, Berkeley