| 摘要 |
PURPOSE:To enable formation of a cathode-ray tube glass panel having high X-ray absorptivity and excellent browning resistance to X-rays and electron rays, by using a specific glass composition. CONSTITUTION:This cathode-ray tube panel glass has essentially the following composition, >=34cm<-1> X-ray absorption coefficient at 0.6Angstrom wavelength and resistance to browning by X-rays and electron rays with hardly any devitrification. 45.0-60.0wt.% SiO2, 0-4.0wt.% Al2O3, 0.5-3.0wt.% Li2O, 2.0-8.0wt.% Na2O, 3.0-10.0wt.% K2O, 0-4.0wt.% MgO, 0-4.0wt.% CaO, 3.0-14.0wt.% SrO, 8.0-20.0wt.% BaO, 5.0-12.0wt.% ZnO, 0-2.0wt.% ZrO2, 0-3.0wt.% TiO2, 0.1-2.0wt.% CeO2, 0-0.5wt.% Sb2O3 and 0-2.0wt.% P2O5.
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