Uv-emitting phosphor blend and tanning lamp containing same

Details Uv-emitting phosphor blend and tanning lamp containing same Uv-emitting phosphor blend and tanning lamp containing same

C - Chemistry, Metallurgy

09

K

C09K 11/70 (2006.01) C09K 11/08 (2006.01) C09K 11/66 (2006.01) C09K 11/77 (2006.01) H01J 61/44 (2006.01)

Patent

CA 2479860

A UV-emitting phosphor blend is provided which comprises a mixture of at least two UVA-emitting phosphors selected from SrB4O7:Eu, YPO4:Ce, and BaSi2O5:Pb wherein the sum of the weight percentages of the phosphors in the mixture equals 100%. The phosphor blend may additionally contain an amount of a UVB- emitting phosphor in an amount from 0 to 12 wt.% of the mixture. Tanning lamps containing these blends exhibit increases in initial UVA output and UVA maintenance.

L'invention concerne un mélange de phosphore émettant des rayons UV, qui comprend un mélange d'au moins deux phosphores émettant des UVA, sélectionnés parmi SrB¿4?O¿7?:Eu, YPO¿4?:Ce et BaSi¿2?O¿5?:Pb, la somme de pourcentages en poids des phosphores dans le mélange étant égale à 100 %. Le mélange de phosphore peut en outre contenir une quantité de phosphores émettant des UVB dans des quantités entre 0 et 12 % en poids du mélange. Les lampes de bronzage contenant ces mélanges manifestent des augmentations d'émission initiale de rayons UVA et de maintien du rayonnement UVA.

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