Patent ID: 11905198
Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F  Y | IPC C

Claim 0:
1. A glass furnace comprising an additive-containing product comprising, exclusively at the surface, an additive selected from:
phosphorus compounds other than glasses and vitroceramics,
WC, MoO3,
silicon carbide,
boron carbide,
silicon nitride,
boron nitride,
glasses comprising elemental phosphorus and/or iron and/or tungsten and/or molybdenum,
vitroceramics comprising elemental phosphorus and/or iron and/or tungsten and/or molybdenum,
and their mixtures,, said additive-containing product, without taking into account said additive,, having the following chemical analysis, as a percentage by weight on the basis of the oxides:
Cr2O3≥2%, and
Cr2O3+Al2O3+CaO+ZrO2+MgO+Fe2O3+SiO2+TiO2≥90%, and
Cr2O3+Al2O3+MgO≥60%,, the content by weight of additive being in the range 0.01% 6% on the basis of the additive-containing product.