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Nanostructured phosphorescent pigment and uses thereof

Authors: Fernández Lozano, José Francisco; Rojas-Hernández, Rocío E.; Enríquez Pérez, Esther; Rubio Marcos, Fernando; García Juez, Vicente; Antón Ibáñez, Lara;

Nanostructured phosphorescent pigment and uses thereof

Abstract

[ES] La presente invención se refiere a un pigmento fosforescente nanoestructurado que comprende un sustrato de Al2O3; MAl2O4: X nanocristales, donde M es un catión seleccionado de Ca2 +, Sr2 +, Ba2 +, Mg2 +, Zn2 + y combinaciones de los mismos y donde X es un catión seleccionado de Eu2 +, Dy3 +, Nd3 +, Er3 +, La3 +, Lu3 +, Y3 +, Y3 +, Sm3 +, Gd3 +, Tb3 +, Tm3 +, Yb3 + y combinaciones de los mismos, dispuestos sobre el sustrato Al2O3; y nanocristales de sal fundida dispuestos en los nanocristales MAl2O4: X. Además, la invención se refiere a un método para preparar el pigmento fosforescente nanoestructurado de la invención que comprende las etapas de i) mezclar materiales de partida que comprenden un precursor de catión M, un precursor de catión X, Al2O3 y una sal fundida; ii) calentar la mezcla resultante del paso (i) en atmósfera reductora. La invención también se refiere al uso del pigmento fosforescente nanoestructurado de la invención para señalización, iluminación, decoración o autenticación y a un artículo de seguridad que comprende el pigmento fosforescente nanoestructurado de la invención.

[EN] The present invention relates to a nanostructured phosphorescent pigment comprising an Al2O3 substrate; MAl2O4:X nanocrystals, where M is a cation selected from Ca2+, Sr2+, Ba2+, Mg2+, Zn2+ and combinations thereof and where X is a cation selected from Eu2+, Dy3+, Nd3+, Er3+, La3+, Lu3+, Ce3+, Y3+, Sm3+, Gd3+, Tb3+, Tm3+, Yb3+ and combinations thereof, disposed on the Al2O3 substrate; and nanocrystals of molten salt disposed on the MAl2O4:X nanocrystals. Additionally, the invention relates to a method for preparing the nanostructured phosphorescent pigment of the invention comprising the steps of i) mixing starting materials comprising a cation M precursor, a cation X precursor, Al2O3 and a molten salt; ii) heating the mixture resulting from step (i) in reducing atmosphere. The invention also relates to the use of the nanostructured phosphorescent pigment of the invention for signaling, illumination, decoration or authentication and to a security article comprising the nanostructured phosphorescent pigment of the invention.

Consejo Superior de Investigaciones Científicas (España), Fábrica Nacional de Moneda y Timbre - Real Casa de la Moneda

A1 Solicitud de patente con informe sobre el estado de la técnica

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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