Sulfur-containing phosphor powders, methods for making phosphor powders and devices incorporating same
AssigneeSuperior MicroPowders LLC
InventorsMark J. Hampden-Smith, Toivo T. Kodas, James Caruso, Daniel J. Skamser, Quint H. Powell, Klaus Kunze
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Abstract
Sulfur-containing phosphor powders, methods for making phosphor powders and devices incorporating same. The powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention permits the continuous production of such powders. The invention also relates to products such as display devices incorporating such phosphor powders.
Claims20
A powder batch comprising metal sulfide phosphor particles wherein said metal sulfide phosphor particles comprise a metal sulfide host material, and wherein said particles are substantially spherical, have a weight average particle size of from 0.3 μm to not greater than about 5 μm and a particle size distribution wherein at least about 90 weight percent of said particles are not larger than twice said average particle size.
A powder batch comprising mixed metal sulfide phosphor particles comprising a host material having the general formula (M1, M2)S wherein M1 and M2 are selected from Group 2 metals and Group 12 metals, wherein said phosphor particles have a weight average particle size of from 0.3 μm to not greater than about 10 μm and a particle size distribution wherein at least about 90 weight percent of said particles are not larger than twice said average particle size.
Dependencies are inferred from the claim text.