Luminescent screen with thallium activated aluminate

Details Luminescent screen with thallium activated aluminate Luminescent screen with thallium activated aluminate

1975-01-06

1976-05-11

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, C09K 1126, C09K 1130, H01J 6144

Patent

active

039566633

ABSTRACT:
A luminescent screen, particularly for a low-pressure mercury vapor discharge lamp, provided with a luminescent thallium-activated aluminate having the .beta.-alumina structure and defined by the formula (Me.sup.I.sub.1.sub.-x.sub.-p Tl.sub.x Me.sup.II.sub.p) (Al.sub.11.sub.-y Mn.sub.y)O.sub.17 in which Me.sup.I represents at least one of the alkali metals sodium, potassium and rubidium, and in which Me.sup.II represents at least one of the alkaline earth metals calcium, strontium and barium, in which up to 50 mol % of aluminum may be replaced by gallium, and in which

REFERENCES:
patent: 3502592 (1970-03-01), Amster
patent: 3577169 (1971-05-01), Barry
patent: 3577350 (1971-05-01), Amster

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