Al additions for grain pinning in Y2O3—MgO

US12129209B2 · kind B2 · utility

Assignee

• Raytheon Company · US

Inventors

• Kenneth David Smith · East Longmeadow, US
• Stephanie Silberstein Bell · North Andover, US
• Christopher S. Nordahl · Chelmsford, US
• Thomas M. Hartnett · Nashua, US
• Richard Gentilman · Acton, US
• R. Wesley Jackson · Town of West Hartford, US

Key dates

• Filing date: Jan 25, 2022
• Grant date: Oct 29, 2024
• Expiry date: May 13, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9653
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A nanocomposite optical ceramic (NCOC) material. The material having a first solid phase, a second solid phase, and a third solid phase. The first solid phase has first solid phase grains no larger than 5 μm, and each first solid phase grain has a first solid phase grain boundary. The second solid phase has second solid phase grains no larger than 5 μm, and each second solid phase grain has a second solid phase grain boundary. The third solid phase has a doping agent. The doping agent is less than 5 atomic % soluble in the first solid phase and the second solid phase. At least part of the third solid phase is situated at the second solid phase grain boundary.