초록 ▼

Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by Tb3+and/or Ce3+and have a composition comprising 35-85 mol % of SiO2 and/or B2O3, 1-35 mol % of La2O3 and/or Gd2O3, 5-45 mol % of Al2O3 and 0.5-30 mol % of Tb2O3 and/or Ce2O3. The La2O3 a

Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by Tb3+and/or Ce3+and have a composition comprising 35-85 mol % of SiO2 and/or B2O3, 1-35 mol % of La2O3 and/or Gd2O3, 5-45 mol % of Al2O3 and 0.5-30 mol % of Tb2O3 and/or Ce2O3. The La2O3 and/or Gd2O3 may be replaced up to not more than 50 mol % by Y2O3, Sc2O3, Lu2O3, ZrO2, P2O5 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.

대표청구항 ▼

A luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by a rare earth metal, characterized in that the glass is activated by at least one of the rare earth metals Tb3+and Ce3+has a composition comprising 35-85 mol% of SiO2 and/or B2O3, 1-35 m

A luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by a rare earth metal, characterized in that the glass is activated by at least one of the rare earth metals Tb3+and Ce3+has a composition comprising 35-85 mol% of SiO2 and/or B2O3, 1-35 mol% of La2O3 and/or Gd2O3, 5-45 mol% of Al2O3 and 0.5-30 mol% of Tb2O3 and/or Ce2O3 in which the La2O3 and/or Gd2O3 are replaceable in amounts up to than 50 mol% by one or more of the oxides Y2O3, Sc2O3, Lu2O3, ZrO2, P2O5 and the alkaline earth metal oxides, the rare earth metal oxides being at least 99.99% pure and the other oxides being at least 99.999% pure, the luminescent glass having a quantum efficiency of at least 46% when excited by 254 nm radiation.