Luminescent alumino-silicate and/or alumino-borate glass compris

Details Luminescent alumino-silicate and/or alumino-borate glass compris Luminescent alumino-silicate and/or alumino-borate glass compris

1987-10-07

1989-01-17

Cooper, Jack

Stock material or miscellaneous articles

Composite

Of quartz or glass

2523014F, 2523014P, 2523014R, 428690, 501 50, 501 64, C09K 1180

Patent

active

047987685

ABSTRACT:
Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by Tb.sup.3+ and/or Ce.sup.3+ and have a composition comprising 35-85 mol % of SiO.sub.2 and/or B.sub.2 O.sub.3, 1-35 mol % of La.sub.2 O.sub.3 and/or Gd.sub.2 O.sub.3, 5-45 mol % of Al.sub.2 O.sub.3 and 0.5-30 mol % of Tb.sub.2 O.sub.3 and/or Ce.sub.2 O.sub.3. The La.sub.2 O.sub.3 and/or Gd.sub.2 O.sub.3 may be replaced up to not more than 50 mol % by Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, Lu.sub.2 O.sub.3, ZrO.sub.2, P.sub.2 O.sub.5 and/or alkaline earth metal oxides. The glass can be used in a luminescent screen, for example, of a low-pressure mercury vapour discharge lamp.

REFERENCES:
patent: 3523091 (1970-08-01), McAllister
patent: 3935119 (1976-01-01), Barber et al.
patent: 4102805 (1978-07-01), Mizzoni et al.

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