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US 7,022,261 B2Granted
Sulfur-containing phosphor powders, methods for making phosphor powders and devices incorporating same
AssigneeCabot Corporation
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.
Claims12
A method for the production of a sulfur-containing phosphor powder, comprising the steps of:
- a) forming an aqueous-based solution comprising soluble precursors of a sulfur-containing phosphor;
- b) generating an aerosol of droplets from said aqueous-based solution;
- c) heating said droplets to form a particulate intermediate compound that is capable of being post-treated to form said sulfur-containing phosphor compound;
- and
- d) treating said particulate intermediate compound to form said sulfur-containing phosphor powder.
2 more elements
Dependencies are inferred from the claim text.