Process for producing electroluminescent phosphor with extended half-life
AssigneeOsram Sylvania Inc.
InventorsRichard G. W. Gingerich, Clarence D. Vanderpool
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Abstract
An electroluminescent phosphor with an extended half-life is created by means of the present invention by taking an amount of a phosphor and treating it with antimony comprising the steps of placing an amount of antimony in an inert reaction vessel, placing a vapor permeable filter on top of the antimony, placing a phosphor with a given half-life on top of the vapor permeable filter, evacuating the reaction vessel below one atmosphere and heating it for a period of time to allow the antimony to react with the phosphor to produce a new phosphor with an extended half-life.
Claims5
A process for producing an electroluminescent phosphor comprising:
- (a) placing an amount of antimony in an inert reaction vessel;
- (b) placing a vapor permeable filter on top of the antimony;
- (c) placing a phosphor with a given half-life on top of the filter;
- (d) evacuating the vessel below one atmosphere;
- (e) heating the vessel for a period of time to allow the antimony to react with the phosphor to produce a new phosphor having a half-life greater than the original phosphor.
Dependencies are inferred from the claim text.