Long persistent phosphor incorporated within a settable...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 11/00 (2006.01) C04B 7/00 (2006.01) C09D 5/22 (2006.01) C09K 11/02 (2006.01) C09K 11/77 (2006.01)

Patent

CA 2394988

A process for incorporating a long persistent phosphor within a settable material includes firing a doped phosphor to obtain a phosphor having a persistence that ranges from minutes to hours. The fired phosphor is then ground into a phosphor particulate having a mean domain size. Typical particulate mean domain size ranges from 1 to 60 microns. The phosphor particulate is thereafter encapsulated within a water impervious coating material such as silicon oxide or fluoride. The coated phosphor particulate is then mixed in a specified volume ratio within the settable material while the settable material is in a pre-set state. Typical formulation ratios range from 0.1 to 30 volume percent of particulate. A method of forming a phosphorescent solid article is also disclosed.

La présente invention concerne un procédé d'incorporation d'un phosphore persistant au sein d'un matériau durcissable comportant une étape de cuisson de phosphore dopé en vue d'obtenir un phosphore présentant un persistance comprise entre quelques minutes et quelques heures. Le phosphore cuit est ensuite broyé en phosphore en particules présentant une granulométrie moyenne. Des particules type présentent une granulométrie moyenne comprise entre 1 et 60 microns. Le phosphore en particules est ensuite enrobé au sein d'une couche de matière imperméable à l'eau, telle l'oxyde ou le tétrafluorure de silicium. Les particules de phosphore enrobées sont ensuite mélangées selon en rapport volumique déterminé dans un matériau lorsque le matériau est dans un état préalable au durcissement. Des rapports de formulation types sont compris entre 0,1 et 30 % en volume des particules. L'invention concerne également un article solide phosphorescent.

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