Bivalent europium-activated barium aluminate phosphor and low me

Details Bivalent europium-activated barium aluminate phosphor and low me Bivalent europium-activated barium aluminate phosphor and low me

1985-07-01

1986-05-20

Moore, David K.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, H01J 6144, C09K 1108

Patent

active

045904057

ABSTRACT:
A luminescent screen provided with a luminescent layer (4) disposed on a support (1) and containing an alkaline earth metal aluminate activated by bivalent europium. The alkaline earth metal is barium which may be replaced up to 25 mol. % by strontium. The aluminate has a crystal structure, the X-ray powder diagram of which corresponds or substantially corresponds to the diagram given in Table I of the description, while the ratio of alkaline earth metal to aluminium in the aluminate has a value of 1:5 to 1:10. An advantageous use of such a luminescent screen is found in low-pressure mercury vapor discharge lamps.

REFERENCES:
patent: 4088923 (1978-05-01), Manders
patent: 4208611 (1980-06-01), Watanabe et al.
patent: 4431941 (1984-02-01), Roy et al.

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