| 摘要 |
A glass is composed, in wt. %, of: SiO2, 62-66; Na2O, 7-8.5; K2O, 6.5-9; CaO, 2-4.5; BaO, 11-14; Al2O3, 1-4; As2O3 + Sb2O3, 0.3-0.7; CeO2, 0.05-0.3; Li2O, 0-1; MgO, 0-3; PbO, 0-2. The glass may be used in cathode ray tubes, e.g. for colour television, wherein at least the window of the tube bulb is formed of the glass. The glass has high X-ray absorption. |
