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 16:
17. A glass furnace comprising an additive-containing product comprising, at the surface and/or in the core, 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% to 6% on the basis of the additive-containing product,, the additive-containing product being obtained by a method comprising the following steps in succession:
A) preparing a feedstock comprising a particulate mixture and water;
B) shaping said feedstock in a manner such as to form a preform;
C) optionally, sintering said preform in a manner such as to obtain a sintered product,, a precursor of said additive being added to the feedstock and/or applied to the surface of the preform and/or applied to the surface of the sintered product, wherein said additive precursor is selected from FePO4, MgPO4, ZnPO4, CuPO4, H3PO4, WO3, WC, MoO3, Si, Al, Fe, SiAl, FeSi, SiC, B4C, Si3N4, a glass comprising iron, and their mixtures.