Luminescent bivalent europium-activated barium borophosphate and

Details Luminescent bivalent europium-activated barium borophosphate and Luminescent bivalent europium-activated barium borophosphate and

1979-01-10

1980-01-22

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014P, 2523014R, 423277, 423305, 428539, C09K 1146, H01J 163

Patent

active

041852222

ABSTRACT:
Luminescent bivalent europium-activated barium borophosphates having defined compositions by the formula Ba.sub.3-p Eu.sub.p BP.sub.3 O.sub.12, where 0.01.ltoreq.p.ltoreq.0.50. A quantity of not more than 20 mole % of the Ba may be replaced by Sr and/or Ca. The borophosphate can be used in luminescent screens of low-pressure mercury vapour discharge lamps.

REFERENCES:
patent: 3575879 (1971-04-01), Blasse et al.
patent: 3586637 (1971-06-01), Blasse et al.
patent: 3599028 (1971-08-01), Wanmaker et al.
patent: 4049992 (1977-09-01), Verstegen et al.

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