Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1996-10-15
1998-06-30
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
2523014F, 2523014S, C09K 1108
Patent
active
057729166
ABSTRACT:
A phosphor powder for producing a high resolution phosphor screen and a phosphor screen are provided. The phosphor screen comprises a substrate, an infrared-absorbing layer, and a phosphor layer coated on the infrared-absorbing layer, wherein the phosphor layer comprises a phosphor powder in which a substantial amount of particles in the powder have a particle size as measured in the longest dimension of greater than 0 and less than about 5 microns. The phosphor screen may also comprise a black, infrared-absorbing substrate with the phosphor layer coated on the substrate. The phosphor powder is formed by preparing a phosphor composition, sintering the composition to form ingots, grinding the ingots to form a powder wherein a substantial amount of particles in the powder have a particle size of greater than 0 and less than about 5 microns, reactivating the powder in an inert atmosphere to a temperature of from about 500.degree. C. to about 550.degree. C., preparing a suspension of the powder and a nonreactive organic solvent, mixing the suspension to separate particles of the powder which partially fuse during reactivation and to break up large agglomerates of the powder in the suspension, decanting the suspension to at least partially separate the nonreactive inorganic solvent and the powder, and drying the powder to form the phosphor powder.
REFERENCES:
patent: Re31847 (1985-03-01), Luckey
patent: 3040202 (1962-06-01), Lehmann
patent: 3668142 (1972-06-01), Luckey
patent: 3859527 (1975-01-01), Luckey
patent: 4236078 (1980-11-01), Kotera et al.
patent: 4239968 (1980-12-01), Kotera et al.
patent: 4368390 (1983-01-01), Takahashi et al.
patent: 4547672 (1985-10-01), Arakawa et al.
patent: 4621196 (1986-11-01), Arakawa
patent: 4628208 (1986-12-01), Arakawa
patent: 4705952 (1987-11-01), Lindmayer
patent: 4812659 (1989-03-01), Lindmayer
patent: 4812660 (1989-03-01), Lindmayer
patent: 4822520 (1989-04-01), Lindmayer
patent: 4830875 (1989-05-01), Lindmayer
patent: 4855603 (1989-08-01), Lindmayer
patent: 4915982 (1990-04-01), Lindmayer
patent: 4983834 (1991-01-01), Lindmayer et al.
patent: 4992302 (1991-02-01), Lindmayer
patent: 5028793 (1991-07-01), Lindmayer et al.
patent: 5124558 (1992-06-01), Soltani et al.
patent: 5378897 (1995-01-01), Suzuki
S.P. Keller et al., "Studies on Some Infrared Stimulable Phosphors," Physical Reviews, vol. 108, No. 3, (Nov. 1, 1957), pp. 663-676.
S.P. Keller and G.D. Pettit, "Quenching, Stimulation, and Exhaustion Studies on Some Infrrared Stimulable Phosphors," Physical Review, vol. 111, No. 6 (Sep. 15, 1958), pp. 1533-1539.
S.P. Keller, "Fluorescence Spectra, Term Assignments, and Crystal Field Splittings of Rare Earth Activated Phosphors," The Journal of Chemical Physics, vol. 29, No. 1, (Jul. 1958), pp. 180-187.
S.P. Keller, "Variation of Valence State of Eu in SrS Phosphors," The Journal of Chemical Physics, vol. 30, No. 2, (Feb., 1959), pp. 556-560.
Jamil Fauzia
Soltani Peter K.
Bonner Melissa
Liberty Technologies, Inc.
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