Luminescent screen and low-pressure mercury vapor discharge lamp

Details Luminescent screen and low-pressure mercury vapor discharge lamp Luminescent screen and low-pressure mercury vapor discharge lamp

1986-06-02

1987-12-29

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014F, 428690, C09K 11475

Patent

active

047163356

ABSTRACT:
A luminescent screen provided with a terbium-activated silicate having a cuspidine crystal structure according to the formula Y.sub.4-x-z-p Ca.sub.x M.sub.z.sup.II Tb.sub.p Si.sub.2-y Al.sub.y O.sub.7+x+z+y N.sub.2-x-z-y. In this formula M.sup.II is at least one of the elements Mg, Sr and Ba. The yttrium can be replaced up to at most 50 mol. % by Gd and/or La. It further holds that:

REFERENCES:
patent: 3523091 (1970-08-01), McAllister
patent: 3758413 (1973-09-01), Peters

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