Method for making float glass having reduced defect density

Details Method for making float glass having reduced defect density Method for making float glass having reduced defect density

C - Chemistry, Metallurgy

03

C

C03C 3/087 (2006.01) C03B 5/235 (2006.01) C03B 18/18 (2006.01) C03B 18/20 (2006.01) C03C 4/02 (2006.01)

Patent

CA 2499945

A method for reducing the defect density of glass comprising melting a glass composition comprising from 65-75 wt.% of SiO2; from 10-20 wt.% of Na2O; from 5-15 wt.% of CaO; from 0-5 wt.% of MgO; from 0-5 wt.% of Al2O3; from 0-5 wt.% of K2O; from 0-2 wt.% Fe2O3; and from 0-2 % FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.

La présente invention a trait à un procédé permettant la réduction de densité de défauts de verre comprenant la fusion d'une composition de verre comportant 65-75 % en poids de SiO¿2?, 10-20 % en poids de Na¿2?O, 5-15 % en poids de CaO, 0-5 % en poids de MgO, 0-5 % en poids de Al¿2?O, 0-5 % de K¿2?O, 0-2 % de Fe¿2?O¿3?, et 0-2 % de FeO, la composition comprenant un indice d'intensité de champ totale égal ou supérieur à 1,23.

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