Ultra-black coating due to surface morphology
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United States of America Patent
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Nov 30, 1982
Issued Date -
N/A
app pub date -
Aug 18, 1981
filing date -
Apr 20, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a method of producing an ultra-black surface coating, having an extremely high light absorption capacity, on a substrate, such as a metal, ceramic, glass, or plastic, the blackness being associated with a unique surface morphology consisting of a dense array of microscopic pores etched into the surface, as well as the resulting coated substrate. The ultra-black surface, which has a spectral reflectance on the order of about from 0.5 to 1.0% at wavelengths of light of about from 320 to 2140 nanometers, finds use as a solar collector in the field of solar energy.
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