| 摘要 |
An alkali-free aluminoborosilicate glass having a coefficient of thermal expansion alpha20/300 of between 2.8x10<-6>/K and 3.8x10<-6>/K, which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2)>58-65, boric oxide (B2O3)>6-11.5, magnesium oxide (MgO) 4-8, barium oxide (BaO) 0-<0.5, zinc oxide (ZnO) 0-2 and aluminum oxide (Al2O3)>14-25, calcium oxide (CaO) 0-8, strontium oxide (SrO) 2.6-<4, with barium oxide (BaO)+strontium oxide (SrO)>3, or aluminum oxide (Al2O3)>14-25, calcium oxide (CaO) 0-<2, strontium oxide (SrO)>0.5-<4, or aluminum oxide (Al2O3)>21-25, calcium oxide (CaO) 0-8, strontium oxide (SrO)>2.6-<8, with barium oxide (BaO)+strontium oxide (SrO)>3, and which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics.
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