Luminescent aluminoborate glass and luminescent screen provided

Details Luminescent aluminoborate glass and luminescent screen provided Luminescent aluminoborate glass and luminescent screen provided

1986-04-08

1988-06-14

Cooper, Jack

Stock material or miscellaneous articles

Composite

Of inorganic material

2523014R, 2523014F, 2523016R, 2523016F, 428427, 428428, C09K 11475

Patent

active

047511486

ABSTRACT:
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 B.sub.2 O.sub.3 and/or SiO.sub.2 and from 1 to 35 mol. % of Al.sub.2 O.sub.3. The glass contains as activator Tb.sup.3+ and/or Ce.sup.3+ in a quantity, calculated as Tb.sub.2 O.sub.3 and/or Ce.sub.2 O.sub.3, 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.

REFERENCES:
patent: 3052637 (1962-09-01), Bishay
patent: 3522191 (1970-07-01), Turner et al.
patent: 3917488 (1975-11-01), Malmendier
Blasse et al., "J. of Chem. Phys.", vol. 47, No. 6, 1967, pp. 1920-1926.

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