| 摘要 |
New, PbO-free glasses for cathode ray tubes are composed of (in % by weight) 50-52 SiO2; 0-3 Al2O3; 1-1.7 Li2O; 6.5-10.7 Na2O; 0-4.5 K2O; 0.4-1.4 F; 0-0.5 TiO2; 0.2-1.2 CeO2; 0-5 ZnO; 0-7.0 BaO; 15-22 SrO; and 6.3-10.3 ZrO2, and are characterized by a high protective effect against X-rays while having at the same time good resistance to acid and stability to radiation.
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