Phosphors with improved lumen output and lamps made therefrom

Details Phosphors with improved lumen output and lamps made therefrom Phosphors with improved lumen output and lamps made therefrom

C - Chemistry, Metallurgy

09

K

C09K 11/08 (2006.01) C09K 11/70 (2006.01) C09K 11/73 (2006.01) F21K 2/00 (2006.01) H01J 61/38 (2006.01) H01J 61/42 (2006.01)

Patent

CA 2360398

A phosphor having a continuous protective bi-layer coating of alumina surrounding silica surrounding the phosphor particles is disclosed. The method of making a bi-layer coating on phosphor particles is also disclosed. The first layer surrounding the phosphor is silica. The second layer surrounding the phosphor is alumina. The bi-layer phosphor is useful in fluorescent lamps providing improved maintenance and brightness. The bi-layer phosphor can also be used in high color rendition lamps employing blends of phosphors.

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