Selective reflecting metal/metal oxide coatings using surfactant to promote uniform oxidation
AssigneePPG Industries, Inc.
InventorHelmut Franz
Life of this patent
Estimating the term…
Abstract
Metal/metal oxide coated articles having selective reflectance and transmittance of radiation over an extended spectral range are provided by a combination of alternately disposed coating layers of metal and metal oxide, the metals of the metal layer being silver, chromium, iron, cobalt or nickel and the metal oxide being copper oxide. Chemical or electroless plating techniques are disclosed for the production of such articles. Uniform oxide coatings are formed by first depositing metal films, then treating them with surfactants to promote uniform oxidation and then exposing them to an oxidizing environment.
Claims7
In the preparation of a metal oxide comprising heating a metal to be oxidized in an oxidizing atmosphere to a temperature of at least about 300.degree.F, the improvement comprising contacting the metal with a surfactant which renders the surface of the metal hydrophobic when dried in air and then drying the contacted metal prior to heating the metal to a temperature of at least about 300.degree.F.
Dependencies are inferred from the claim text.