Beryllium-containing europium activated phosphate phosphor, lumi

Details Beryllium-containing europium activated phosphate phosphor, lumi Beryllium-containing europium activated phosphate phosphor, lumi

1974-05-22

1977-09-20

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014P, 428532, 428539, C09K 1146, H01J 163

Patent

active

040499928

ABSTRACT:
A luminescent beryllium-containing phosphate activated by bivalent europium defined by the formula Me.sub.a-x Be.sub.b Eu.sub.x P.sub.2 O.sub.8 where a + b = 3 and 0.01.ltoreq.x.ltoreq.0.25 and b has the value 1 or 2. If b = 2, Me mainly represents one of the alkaline earth metals barium, strontium and calcium. If b = 1, Me mainly represents barium and/or strontium.
The luminescent phosphate may be used in mercury vapor discharge lamps and in low-pressure cadmium vapor discharge lamps.

REFERENCES:
patent: 2752313 (1956-06-01), Wollenton
patent: 3516940 (1970-06-01), Lagos
patent: 3544483 (1970-12-01), Lagos
Lagos, "J Electro Chem Soc.", vol. 117, No. 9, Sept. 1970, pp. 1189-1193.

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