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Proceedings Paper

Development Of ZrOxNy Films For Solar Absorbers
Author(s): R. L. Lincoln; D. K. Deardorff; R. Blickensderfer
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Paper Abstract

For maximum effectiveness of solar-thermal conversion, a solar absorber must be a low emitter of thermal radiation. Thin film absorber stacks which possessed such spectrally selective characteristics were developed by the Bureau of Mines. The stacks consisted of zirconium suboxide or subnitride absorber films on a reflective film of silver or copper. The absorber films were prepared by reactively sputtering zirconium in argon with small amounts of oxygen, nitrogen, or both, or by oxidation of zirconium films in air. The solar absorptance and the thermal emittance were calculated from reflectance data. The solar absorptance, a(s), ranged from 0.60 to 0.93 and the emittance, e(T), at 600 K, ranged from 0.024 to 0.28. Ratios of a(s)/e(T) extended from about 2 to 28. The stacks appear relatively stable under vacuum at temperatures up to about 600 K.

Paper Details

Date Published: 16 March 1976
PDF: 8 pages
Proc. SPIE 0068, Optics in Solar Energy Utilization I, (16 March 1976); doi: 10.1117/12.978115
Show Author Affiliations
R. L. Lincoln, U.S. Bureau of Mines (United States)
D. K. Deardorff, U.S. Bureau of Mines (United States)
R. Blickensderfer, U.S. Bureau of Mines (United States)

Published in SPIE Proceedings Vol. 0068:
Optics in Solar Energy Utilization I
Yale Katz, Editor(s)

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