Luminescent compositions and structures incorporating them

Details Luminescent compositions and structures incorporating them Luminescent compositions and structures incorporating them

1991-08-29

1994-08-09

Tucker, Philip

Compositions

Light transmission modifying compositions

2523014H, 252588, 423462, F21V 900, C09K 1108, C01B 700

Patent

active

053364490

ABSTRACT:
Phosphorescent compounds of the formula M.sub.2 AOF.sub.5, wherein M is potassium, rubidium or cesium and A is tantalum or niobium, are prepared by the reaction of the appropriate alkali metal fluoride with niobium or tantalum pentoxide in aqueous hydrofluoric acid solution. They have no electrons in the d orbitals of the ground state, and therefore are useful in applications requiring phosphors with short primary decay times.

REFERENCES:
Srivastava et al., Chemical Abstracts, 115:63285k, (1991).
Hua et al., Journal of Non-Crystalline Solids, 107, pp. 219-224, (1989).
Srivastava et al., Mat. Res. Bull., vol. 26, pp. 443-448, 1991.

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