Europium- and bismuth-doped luminescent compositions

Details Europium- and bismuth-doped luminescent compositions Europium- and bismuth-doped luminescent compositions

1992-11-06

1993-07-27

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

423263, C09K 1178

Patent

active

052308316

ABSTRACT:
Phosphorescent compositions of the formula NaY.sub.1-x A.sub.x M.sub.2 O.sub.6, wherein A is europium or bismuth, M is zirconium or hafnium and x is in the range of about 0.001-0.25, are prepared by the reaction of appropriate proportions of sodium bicarbonate and the corresponding metal oxides. They have a cubic fluorite-type crystal lattice.

REFERENCES:
patent: 3640887 (1972-02-01), Anderson
patent: 4014812 (1977-03-01), Kelsey et al.
patent: 4153469 (1979-05-01), Alexandrov et al.
patent: 4295989 (1981-10-01), Klein et al.
patent: 4980559 (1990-12-01), Bryan et al.
patent: 4988880 (1991-01-01), Bryan et al.
Maksimov et al "Soviet Physics-Crystallography" vol. 11, No. 4, Jan. 1967 pp. 583-584.
McCauley et al "J. of Lumin.", 6 (1973), pp. 105-115.
Blasse et al "Mater. Res. Bull.", 19(8), 1984, pp. 1057-1062.
Chimcholkar "Chem. Abstr.", vol. 84, 1976, 82852a.

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