Alkali-free aluminoborosilicate glass, and uses thereof

Details Alkali-free aluminoborosilicate glass, and uses thereof Alkali-free aluminoborosilicate glass, and uses thereof

C - Chemistry, Metallurgy

03

C

261/19, 345/23

C03C 3/091 (2006.01) G02F 1/133 (2006.01)

Patent

CA 2330752

The invention relates to an alkali-free aluminoborosilicate glass having a coefficient of thermal expansion .alpha.20/300 of between 2.8 ~ 10 -6/K and 3.6 ~ 10 -6/K, which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2) > 58 - 65, boric oxide (B2O3) > 6 - 11.5, aluminum oxide (Al2O3) > 20 - 25, magnesium oxide (MgO) 4 - < 6.5, calcium oxide (CaO) > 4.5 - 8, strontium oxide (SrO) 0 - < 4, barium oxide (BaO) 0.5 - < 5, with strontium oxide (SrO) + barium oxide (BaO) > 3, zinc oxide (ZnO) 0 - < 2, and which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics.

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