Blue phosphor for fluorescent display and method for...

Details Blue phosphor for fluorescent display and method for... Blue phosphor for fluorescent display and method for...

2005-03-15

2005-03-15

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

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

Reexamination Certificate

active

06866796

ABSTRACT:
Provided are a blue phosphor for a fluorescent display having a high luminous efficiency, and a method for synthesizing the same. The blue phosphor is obtained from a host composed of strontium carbonate (SrCO3) and an activator composed of a cerium compound. The method for synthesizing the blue phosphor includes preparing a mixture having strontium carbonate (SrCO3) and a cerium oxide (CeO2) homogenously mixed according to the composition having the following general formula:in-line-formulae description="In-line Formulae" end="lead"?SrCO3+xCeO2in-line-formulae description="In-line Formulae" end="tail"?wherein 0.01≦x≦0.5, and annealing the mixture at 800 to 900° C.

REFERENCES:
patent: 2911376 (1959-11-01), Rudolph
patent: 6013199 (2000-01-01), McFarland et al.
Definition of “annealing” from 14thed. of Hawley's Condensed Dictionary.

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