Luminescent compositions, methods for making luminescent...

Details Luminescent compositions, methods for making luminescent... Luminescent compositions, methods for making luminescent...

C - Chemistry, Metallurgy

09

K

C09K 11/77 (2006.01)

Patent

CA 2627567

A particulate luminescent composition is disclosed that, when excited by electromagnetic radiation at a first frequency, emits electromagnetic radiation at a second frequency equal to or within 1500 cm'1 of the first frequency. The luminescent composition comprises substantially spherical particles having a weight average particle size of less than about 10 µm and a particle size distribution such that at least about 90 weight percent of the particles are not larger than twice the average particle size.

L~invention concerne une composition luminescente particulaire qui, lors d~une excitation par un rayonnement électromagnétique à une première fréquence, émet un rayonnement électromagnétique à une seconde fréquence égale ou comprise dans une plage de 1 500 cm-1 par rapport à la première fréquence. La composition luminescente comprend des particules sensiblement sphériques présentant une taille de particule moyenne en poids inférieure à environ 10 µm et une distribution de tailles de particule telle qu~au moins environ 90 pour cent en poids des particules ont une taille inférieure ou égale au double de la taille de particule moyenne.

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