UV-radiation absorbing glass with reduced absorption of...

Details UV-radiation absorbing glass with reduced absorption of... UV-radiation absorbing glass with reduced absorption of...

2008-05-20

2008-05-20

Brunsman, David M (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S066000, C501S067000, C065S134300

Reexamination Certificate

active

10861822

ABSTRACT:
The method for making UV-absorbing glass, which transmits in a visible range, includes melting raw materials to form a melt and producing the melt under oxidative conditions. The UV-absorbing glass is free of PbO and has the following composition (in % by weight): SiO2, 55-79; B2O3, 3-25; Al2O3, 0-10; Li2O, 0-10; Na2O, 0-10; K2O, 0-10; MgO, 0-2; CaO, 0-3; SrO, 0-3; BaO, 0-3; ZnO, 0-3; ZrO2, 0-3; CeO2, 0-1; Fe2O3, 0-1; WO3, 0-3; Bi2O3, 0-3; MoO3, 0-3; with Σ Li2O+Na2O+K2O=0.5 to 16 and Σ MgO+CaO+SrO+BaO+ZnO=0-10. The melt composition is characterized by including 0.1 to 10 % TiO2and from 0.01-10 % As2O3. The glass made by the method and its properties are also disclosed. The glass is useful in lamps, LCD displays, monitors and glass-to-metal seals with molybdenum, tungsten and Fe—Co—Ni alloys.

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