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US 5,102,579 AGranted
Method for preparing sulfide phosphors
AssigneesUSR Optonix Inc., Kasei Optonix, Ltd.
InventorsShuji Inaho, Michael D. Christiansen
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AssigneesUSR Optonix Inc., Kasei Optonix, Ltd.
InventorsShuji Inaho, Michael D. Christiansen
Estimating the term…
A method for preparing a sulfide phosphor where a raw material mixture for a sulfide phosphor is placed in an almost closed first heat-resistant container and fired therein, the method being characterized in that an auxiliary material composed of carbon and/or a carbon-forming compound capable of being pyrolyzed at a temperature not higher than the firing temperature to form carbon, and a metal sulfide capable of recting with the carbon and/or said carbon-forming compound at a temperature not lower than 600.degree. C. but not higher than the firing temperature to form a carbon sulfide is placed in the portion as physically separated from the raw material mixture for the sulfide phosphor in the said first heat-resistant container and the firing is conducted under such condition so that said first heat-resistant container may have a carbon sulfide atmosphere by the thermal reaction of the thus fired auxiliary materials.
A method for preparing a sulfide phosphor, comprising firing in a covered heat-resistant container
The method of claim 15, wherein said raw material is (Zn.sub.1-x,Cd.sub.x)S, wherein 0.ltoreq..times..ltoreq.1, and said raw material further comprises at least one compound selected from the group consisting of compounds of Ag, Cu, Au, Pb, Al, Ga, In, Tl, Cl, Br, and I.
A method for preparing a sulfide phosphor, comprising firing in a closed container
Dependencies are inferred from the claim text.