Phosphor and its production process

Details Phosphor and its production process Phosphor and its production process

2006-02-21

2006-02-21

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

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

C252S30140F, C252S30140P, C252S30140H, C252S30140S, C252S301500, C252S30160R, C252S30160S, C252S30160P, C252S30160F

Reexamination Certificate

active

07001537

ABSTRACT:
The present invention is to provide a phosphor of minimum particle size having an excellent crystallinity and a high brightness higher than conventional crude particles, which is usable for a highly precise display, a highly bright illuminating element or illuminating apparatus, a high speed immunoassay system or the like, i.e. a phosphor having a substantially spherical outer shape, which comprises primary particles having a median diameter D50in a range of from 0.05 μm to 1 μm and secondary particles having a median diameter D50in a range of from 0.1 μm to 2 μm, wherein at least 50 vol % of the total secondary particles has an aspect ratio of at least 0.8 and an internal quantum efficiency is in a range of from 0.8 to 1.

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Y. C. Kang, et al., Journal of Materials Science Letters, vol. 19, pp. 1225-1227, “The Effect of Metal Carbonate Fluxes on the Crystallinity, Morphology, and Photoluminescence Characteristics of Y2O3:Eu Phosphor in Spray Pyrolysis”, 2000.
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