HIGH TEMPERATURE SOLAR ABSORBER COATINGS.
Abstract
The object of this project was to develop a solar absorber coating stable up to 1000 C in a vacuum of 2 times 10 to the -5th power torr with a solar absorptance of 0.9 and an emittance of 0.1 at 1000 C. Of the three techniques investigated -multiple metal and dielectric interference film systems, multiple dielectric thin film infrared reflector systems, and selective blacks -- the interference system demonstrated the most promise. A coating consisting of multiple layers of Al2O3 and molybdenum on a molybdenum substrate gave a solar absorptance of 0.83 and an emittance of 0.11 at 1000 F. The selective black, beryllium + 1% copper alloy anodized in sodium hydroxide, produced a very hard and durable coating with a solar absorptance of 0.94 at room temperature and a solar absorptance of 0.87 with an emittance of 0.30 at 1000 F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0426324
Entities
People
- John E. Janssen
- K. C. Park
- Roger N. Schmidt
Organizations
- Honeywell International, Inc.