Reflective coating, pigment, colored composition, and process of producing a reflective pigment

摘要

A reflective coating is disclosed that has a base layer provided with a reflective surface for reflecting electromagnetic radiation, such as visible and solar near-infrared light. The reflective coating also has a dielectric layer formed on the reflective surface, and an absorber layer. The absorber layer is formed on the dielectric layer that is formed on the base layer. The reflective coating has an average reflectance greater than about 60% for wavelengths of electromagnetic radiation in the range of 800 to 2500 nm that is irradiated upon the reflective coating. Additionally, the reflective coating has an average reflectance for wavelengths of electromagnetic radiation in the range of 400 to 700 nm irradiated upon the reflecting coating that is less than the average reflectance of the reflective coating from 800 to 2500 nm.

主权项

1. A cool dark-colored reflective coating comprising:
a base layer having a reflective surface; a dielectric layer formed on said reflective surface; and an absorber layer formed on said dielectric layer formed on said reflective surface of said base layer, said absorber layer comprising a semiconductor material with a band gap of 1.55 to 1.77 eV; wherein said absorber layer comprises amorphous silicon and said dielectric layer comprises silicon nitride, silicon dioxide, nitrides, oxides, or fluorides; wherein an average reflectance of said reflective coating for wavelengths of electromagnetic radiation in the range of 800 to 2500 nm irradiated upon said reflective coating is greater than about 70%, and an average reflectance of said reflective coating for wavelengths of electromagnetic radiation in the range of 400 to 700 nm irradiated upon said reflecting coating is less than said average reflectance of said reflective coating from 800 to 2500 nm.