Grey glass composition

Details Grey glass composition Grey glass composition

C - Chemistry, Metallurgy

03

C

C03C 4/02 (2006.01) C03C 3/087 (2006.01) C03C 3/095 (2006.01) C03C 4/08 (2006.01)

Patent

CA 2508442

A grey glass composition employing as its colorant portion at least iron (Fe2O3/FeO), cobalt and possibly erbium oxide (e.g., Er2O3) is provided. The glass enables high visible transmission, and satisfactory IR absorption, while at the same time achieving desired grey color. In certain example embodiments, the colorant portion includes: total iron (expressed as Fe2O3): <=0.35% erbium oxide (e.g., Er2O3): 0 to 0.3% selenium (Se): <= 15ppm cobalt oxide (e.g., Co3O4): 6 to 60 ppm glass redox: >=0.35. In other example embodiments, the glass may include higher total iron and/or a lower minimum redox.

Une composition de verre gris utilise dans sa partie colorant au moins du fer (Fe¿2?O¿3?/FeO), du cobalt et éventuellement de l'oxyde d'erbium (e.g., Er¿2?O¿3?). Ce verre permet une bonne transmission de la lumière et une bonne absorption d'IR et possède en même temps un aspect gris désiré. Dans certains modes de réalisation, la portion colorant comprend: du fer total (exprimé comme Fe¿2?O¿3?) <= 0,35 %; de l'oxyde d'erbium (p.ex., Er¿2?O¿3?) 0 à 0,3 %; du sélénium (Se) <= 15 mg/l; de l'oxyde de cobalt (p.ex., Co¿3?O¿4?) de 6 à 60 mg/l; et du redox verre >= 0,35. Dans d'autres modes de réalisation d'exemple, le verre peut contenir plus de fer total et/ou moins de redox minimum.

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