Ce,Pr-coactivated calcium pyrophosphate phosphor and lamp...

Details Ce,Pr-coactivated calcium pyrophosphate phosphor and lamp... Ce,Pr-coactivated calcium pyrophosphate phosphor and lamp...

2006-04-06

2008-07-08

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C313S486000, C313S639000

Reexamination Certificate

active

07396490

ABSTRACT:
A UV-emitting, Ce,Pr-coactivated calcium pyrophosphate phosphor is provided wherein the Pr activator increases the phosphor's sensitivity to excitation by 185 nm radiation. The improved sensitivity to the 185 nm radiation allows the phosphor to make better use of the approximate 10% of the UV radiation that is emitted at 185 nm by a low pressure mercury discharge.

REFERENCES:
patent: 3882041 (1975-05-01), Royce
patent: 4757233 (1988-07-01), Peters et al.
patent: 6398970 (2002-06-01), Juestel et al.
patent: 6734631 (2004-05-01), Juestel et al.

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