Long-lasting phosphor

Details Long-lasting phosphor Long-lasting phosphor

1998-03-16

2000-01-04

Koslow, C. Melisa

Compositions

Inorganic luminescent compositions

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

2523014K, 2523016R, 2523016F, C09K 1159, C09K 1164, C09K 1166, C09K 1171

Patent

active

060106441

ABSTRACT:
There is provided a long-lasting phosphor activated by divalent europium and having a chemical composition RO.multidot.a(Al.sub.1-x Ga.sub.x).sub.2 O.sub.3 .multidot.b(Y.sub.1-y Sc.sub.y).sub.2 O.sub.3 .multidot.cB.sub.2 O.sub.3 .multidot.dEu.sup.2+ .multidot.eM.sup.n+ (where R is at least one selected from the group consisting of alkaline-earth metals including Ba, Sr, Ca and Mg and Zn, and M is at least one auxiliary activator selected from the group consisting of Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) wherein a, b, c, d, e, x and y are within ranges of:

REFERENCES:
patent: 3816328 (1974-06-01), Levene
patent: 4315191 (1982-02-01), Konijnendijk et al.
patent: 4733126 (1988-03-01), Yamakawa et al.

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