Long persistent phosphors and persistent energy transfer...

Details Long persistent phosphors and persistent energy transfer... Long persistent phosphors and persistent energy transfer...

C - Chemistry, Metallurgy

09

K

C09K 11/80 (2006.01) C09K 11/77 (2006.01)

Patent

CA 2517163

The disclosure provides long-persistent phosphors, methods for their manufacture and phosphorescent articles. The disclosure also provides a method for generating a longpersistent phosphorescence at a selected color. The phosphors of the disclosure may be alkaline earth aluminates, alkaline earth silicates, and alkaline earth aluminosilicates. The phosphors include those activated by cerium. The phosphors also include those in which persistent energy transfer occurs from a donor ion to an acceptor ion, producing persistent emission largely characteristic of the acceptor ion.

L'invention concerne des phosphores longue persistance, des procédés de fabrication de ceux-ci et des articles phosphorescents. L'invention concerne également un procédé permettant de générer une phosphorescence longue persistance pour une couleur sélectionnée. Les phosphores selon l'invention peuvent être constitués par des aluminates alcalino-terreux, des silicates alcalino-terreux, et des aluminosilicates alcalino-terreux. Les phosphores décrits comprennent ceux qui sont activés par le cérium. Les phosphores comprennent également ceux pour lesquels un transfert d'énergie persistante se produit d'un ion donneur vers un ion accepteur, produisant des caractéristiques de vaste émission persistante de l'ion accepteur.

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