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 20:
21. The glass furnace as claimed in claim 17, wherein the additive-containing product, without taking into account said additive, has, as percentages by weight on the basis of the oxides:
a content of Cr2O3 of more than 15% and less than 98%; and/or
a content of CaO of more than 0.1% and less than 3%; and/or
a content of Cr2O3+Al2O3 of more than 55%; and/or
a content of SiO2 of more than 0.5% and less than 12%; and/or
a content of ZrO2 of more than 1% and less than 19%; and/or
a content of MgO of less than 20%; and/or
a content of Fe2O3 of less than 30%; and/or
a content of constituents other than Cr2O3, Al2O3, CaO, ZrO2, MgO, Fe2O3, SiO2 and TiO2 of less than 5%.