Luminescent terbium-activated borate, luminescent screen provide

Details Luminescent terbium-activated borate, luminescent screen provide Luminescent terbium-activated borate, luminescent screen provide

1989-09-05

1990-05-15

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, 428690, C09K 1178

Patent

active

049260910

ABSTRACT:
Luminescent terbium-activated alkaline earth metal rare earth metal borate having a monoclinic crystal structure and being defined by the formula M.sub.3 Ln.sub.1-x Tb.sub.x (BO.sub.3).sub.3 in which M is at least one of the elements Ba, Sr and Ca of which up to 34 mol % may be replaced by Mg, in which Ln is at least one of the elements La, Gd, Y and Sc and in which 0.005.ltoreq.x.ltoreq.1.

REFERENCES:
patent: 3423325 (1969-01-01), Wanmaker et al.
patent: 4202794 (1980-05-01), Lehmann
patent: 4233538 (1980-11-01), van de Spijker et al.
patent: 4403171 (1983-09-01), Nakano et al.
patent: 4422007 (1983-12-01), Fovassier et al.
patent: 4810416 (1989-03-01), Hase et al.

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