Chromium oxide powder

US9145320B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN · FR

Inventors

• Cyril Linnot · Val-de-Reuil, FR
• Lionel Moitrier · Mallemort, FR
• Yves Marcel Leon Boussant Roux · Le Pontet, FR
• Olivier Citti · Wellesley, US
• Richard Avedikian · Robion, FR

Key dates

• Filing date: Jul 22, 2011
• Grant date: Sep 29, 2015
• Expiry date: May 3, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a particulate powder, said powder having a median circularity of greater than 0.87 wt % and less than 9.0 wt % of particles having a size greater than 100 μm. The powder and at least 80 wt % of the particles have a chemical composition in wt % on the basis of the oxides and for a total of 100%: Cr2O3+Al2O3+ZrO2+MgO+Fe2O3+SiO2+TiO2≧90%; Cr2O3+Al2O3+MgO≧60%; Cr2O3≧9%; 20%≧SiO2≧0.5%; and other oxides: ≦10%. The invention can be used for a glass furnace.