| 摘要 |
Luminescent aluminoborate and/or aluminosilicate glass which is activated by one or more rare earth metals. The glass has a matrix comprising from 5 to 65 mol. % of one or more of the alkaline earth metal oxides BaO, SrO, CaO, ZnO and MgO, from 20 to 85 mol. % of B2O3 and/or SiO2 and from 1 to 35 mol. % of Al2O3. The glass contains as activator Tb3+ and/or Ce3+ in a quantity, calculated as Tb2O3 and/or Ce2O3, of 0.1 to 10 mol. % with respect to the matrix. The luminescent glasses have high conversion efficiencies, especially high quantum efficiencies upon UV excitation, and are preferably used in luminescent screens of, for example, discharge lamps or cathode-ray tubes. |
