| 摘要 |
The PbO-free UV-absorbing glass is made under oxidative conditions and has a composition, in % by weight, of: SiO<SUB>2</SUB>, 55-79; B<SUB>2</SUB>O<SUB>3</SUB>, 3-25; Al<SUB>2</SUB>O<SUB>3</SUB>, 0-10; Li<SUB>2</SUB>O, 0-10; Na<SUB>2</SUB>O, 0-10; K<SUB>2</SUB>O, 0-10; MgO, 0-2; CaO, 0-3; SrO, 0-3; BaO, 0-3; ZnO, 0-3; ZrO<SUB>2</SUB>, 0-3; CeO<SUB>2</SUB>, 0-1; Fe<SUB>2</SUB>O<SUB>3</SUB>, 0-1; WO<SUB>3</SUB>, 0-3; Bi<SUB>2</SUB>O<SUB>3</SUB>, 0-3; MoO<SUB>3</SUB>, 0-3; SigmaLiO+Na<SUB>2</SUB>O+K<SUB>2</SUB>O=0.5 to 16 and SigmaMgO+CaO+SrO+BaO+ZnO=0-10. It also contains from 0.1 to 10% TiO<SUB>2 </SUB>with at least 95% of the titanium as Ti<SUP>+4 </SUP>so that it has a high visible transmission, reduced color centers, and a sharp UV absorption edge. It is especially useful in lamps display devices and glass-to-metal seals.
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