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Nanostructured phosphorescent pigment and uses thereof

AuthorsFernández Lozano, José Francisco CSIC ORCID ; Rojas-Hernández, Rocío E.; Enríquez Pérez, Esther CSIC ORCID; Rubio Marcos, Fernando CSIC ORCID; García Juez, Vicente; Antón Ibáñez, Lara
Issue Date25-Apr-2018
CitationEP3310878 A0
AbstractThe 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
Appears in Collections:(ICV) Patentes

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