Alkali-free aluminoborosilicate glass, and uses thereof
AssigneeSchott Glas
InventorsUlrich Peuchert, Peter Brix
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Abstract
The invention relates to an alkali-free aluminoborosilicate glass which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2)>58-65, boric oxide (B2O3)>6-10.5, aluminum oxide (Al2O3)>14-25, magnesium oxide (MgO) 0-<3, calcium oxide (CaO) 0-9, strontium oxide (SrO) 0.1-1.5, and barium oxide (BaO)>5-8.5, with strontium oxide (SrO)+barium oxide (BaO)<8.6, and with magnesium oxide (MgO)+calcium oxide (CaO)+strontium oxide (SrO)+barium oxide (BaO) 8-18; 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.
Claims13
Alkali-free aluminoborosilicate glass having a coefficient of thermal expansion α20/300 of between 2.8×10−5/K and 3.8×10−6/K, which has the following composition (in % by weight, based on oxide):
- 2 SiO2 >58-65 B2O3 >6-10.5 Al2O3 >14-25 MgO 0-<3 CaO 0-9 SrO 0.1-1.5 BaO >5-8.5 with SrO + BaO ≦8.6 with MgO + CaO + SrO + BaO 8-18 ZnO 0-<2
Alkali-free aluminoborosilicate glass having a coefficient of thermal expansion α20/300 of between 2.8×10−6/K and 3.6×10−6/K, which has the following composition (in % by weight, based on oxide):
- 4 SiO2 >58-64.5 B2O3 >6-10.5 Al2O3 20.5-24 MgO 0-<3 CaO 2.5-<8 SrO 0.1-3.5 BaO >5-75 with SrO + BaO ≦8.6 with MgO + CaO + SrO + BaO 8-18 ZnO 0-<2
Dependencies are inferred from the claim text.