Coated (core-shell) nanoparticles for nanocomposite optical ceramics

US12145890B2 · kind B2 · utility

Assignee

• Raytheon Company · US

Inventors

• Richard Wesley Jackson · Mystic, US
• Kenneth David Smith · East Longmeadow, US
• Ying She · Town of East Hartford, US
• Stephanie Silberstein Bell · North Andover, US
• Richard Gentilman · Acton, US

Key dates

• Filing date: Dec 16, 2022
• Grant date: Nov 19, 2024
• Expiry date: Dec 16, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/80
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A nanocomposite optical ceramic (NCOC) material includes a plurality of coated (core-shell) nanoparticles having nanoparticles of a first material coated with a coating of a second material. The first material and the second material are mutually insoluble and each have a transmissivity of at least 80% for an intended wavelength. The first material and the second material have a difference in index of refraction of less than 25%. The first material and second material have grins with a diameter of less than 1/20th the intended wavelength. The coating of the second material on the nanoparticles of the first material is up to 50 nm thick. The NCOC contains no more than 0.01% voids per unit volume.