NANOSTRUCTURED PHOSPHORESCENT PIGMENT AND USES THEREOF

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+,...

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Bibliographische Detailangaben
Hauptverfasser:	FERNANDEZ LOZANO, Jose Francisco, ROJAS HERNANDEZ, Rocio Estefania, GARCIA JUEZ, Vicente, RUBIO MARCOS, Fernando, ENRIQUEZ PEREZ, Esther, ANTON IBANEZ, Lara
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	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.