Luminescent materials

Details Luminescent materials Luminescent materials

1978-01-17

1979-12-25

Cooper, Jack

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C09K 1146

Patent

active

041804775

ABSTRACT:
This invention relates to luminescent materials, frequently known as "Phosphors" and suitable for use in cathode ray tubes where a high brightness display is required, for example, in the cockpit of an aircraft.
In particular the luminescent material of the invention comprises a luminescent material comprising an aluminium garnet host material optionally including at least one of the elements scandium and gallium and activated by trivalent terbium and having a composition according to the formula RE.sub.3 Al.sub.(5-(y+z)) Sc.sub.y Ga.sub.z O.sub.12 :Tb, in which RE is one or more of the elements yttrium, gadolinium, lutetium and bismuth and y and z typically have values in the ranges 0.ltoreq.y.ltoreq.2 and 0.ltoreq.z.ltoreq.5.

REFERENCES:
patent: 3717584 (1973-02-01), Byler et al.
Krasmoperov et al., "Chem. Abstracts", vol. 85, 1976, 184251s.
Koga, "Chem. Abstracts", vol. 81, 1974, 97658d.
Bagdasarov et al., "Soviet Physics-Doklady," vol. 19, No. 10, pp. 671-673, 1975.
Philips, "Chem. Abstracts", vol. 81, 1974, 83550a.

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