Dust repellant and anti-reflective inorganic coating and method for preparing the same

US10894888B2 · kind B2 · utility

Assignees

• King Abdulaziz City for Science and Technology · SA
• FRAUNHOFER INSTITUTE FOR SILICATE RESEARCH ISC · DE

Inventors

• Mohammed Abdullah Bahattab · Riyadh, SA
• Walther Glaubitt · Würzburg, DE
• Mark Mirza · Würzburg, DE
• Mohammed I Alhussani · Riyadh, SA

Key dates

• Filing date: Dec 1, 2015
• Grant date: Jan 19, 2021
• Expiry date: Aug 18, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2218/32
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention provides a dust repellant and anti-reflective inorganic coating and the method for preparing the coating. The dust repellant and anti-reflective inorganic coating includes nano-porous silica (SiO2) network of about 5 nm to about 35 nm and is characterized by cracks. The method of preparing the dust repellant and anti-reflective inorganic coating on a substrate includes mixing of aqueous SiO2 solution with a solvent. The aqueous SiO2 solution with the solvent is stirred to form a solution. The solution is coated on the substrate to form a film on the surface of the substrate. Thereafter, the film is annealed by heating the film to a temperature of about 500° C. to about 700° C. within a period of about 2 minutes to about 2 hours. Finally, the film is allowed to cool down.