Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1997-12-24
2000-07-25
Koslow, C. Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
2523016F, 2523014P, 2523016P, C09K 1171, C09K 1159, C09K 1163
Patent
active
060933461
ABSTRACT:
The long afterglow silicate luminescent materials which main chemical composition formula is: aMO-bM'O-cSiO.sub.2 -dR:Eu.sub.x Ln.sub.y, wherein M represents one or more elements selected from a group consisting of Sr, Ca, Ba and Zn; M' represents one ore more elements selected from a group consisting of Mg, Cd and Be; R represents one or two components selected from B.sub.2 O.sub.3 and P.sub.2 O.sub.5 ; Ln represents one or more elements selected from a group consisting of Nd, Dy, Ho, Tm, La, Pr, Tb, Ce, Mn, Bi, Sn and Sb; a, b, c, d, x and y are mole coefficients; wherein 0.6.ltoreq.a.ltoreq.6, 0.ltoreq.b.ltoreq.5, 1.ltoreq.o.ltoreq.9, 0.ltoreq.d.ltoreq.0.7, 0.00001.ltoreq.x.ltoreq.0.2, and 0.ltoreq.y.ltoreq.0.3; these luminescent materials have long afterglow characteristic after absorbing short wavelength lights.
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Xiao Zhiguo
Xiao Zhiqiang
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