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US 5,688,438 AGranted
Preparation of high purity silicate-containing phosphors
AssigneeMicron Display Technology, Inc.
InventorSurjit S. Chadha
Life of this patent
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Abstract
A method of preparing a silicate-containing phosphor is provided. The method includes combining a mixture of metal or metalloid compounds with a gaseous silicon-containing in an amount sufficient to convert the compounds to silicates, and heating the silicates under conditions effective to form a phosphor.
Claims54
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a mixture of oxygen-containing metal or metalloid compounds;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) combining the mixture of metal or metalloid compounds with the gaseous silicon compound in an mount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A phosphor prepared by a method comprising:
- (a) providing a mixture of oxygen-containing metal or metalloid compounds;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) combining the mixture of metal or metalloid compounds with the gaseous silicon compound in an amount sufficient to convert me compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form the phosphor.
2 more elements
A display device comprising a phosphor prepared by a method comprising:
- (a) providing a mixture of oxygen-containing metal or metalloid compounds;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) combining the mixture of metal or metalloid compounds with the gaseous silicon compound in an mount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form the phosphor.
2 more elements
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (b) providing an aqueous solution of a mixture of metal or metalloid salts;
- (c) passing the gaseous silicon compound through the aqueous solution to form silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a mixture of metal or metalloid compounds in the solid state;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) passing the gaseous silicon compound over the mixture of metal or metalloid compounds in an amount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (b) providing an aqueous solution of a mixture of metal or metalloid salts which include metals of Groups IA and IIA, the transition metals, the lanthanides and actinides, and metals and metalloids of Groups IIIA, IVA, and VA;
- (c) passing the gaseous silicon compound through the aqueous solution to form silicates;
- (d) precipitating the silicates out of solution;
- and
- (e) heating the silicates at a temperature of about 1000.degree.-1500.degree. C. to form a phosphor.
3 more elements
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a mixture of metal or metalloid compounds in the solid state which include metals of Groups IA and IIA, the transition metals, the lanthanides and actinides, and metals and metalloids of Groups IIIA, IVA, and VA;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) passing the gaseous silicon compound over the mixture of metal or metalloid compounds in an amount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates at a temperature of about 1000.degree.-1500.degree. C. to form a phosphor.
2 more elements
A phosphor prepared by a method comprising:
- (a) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (b) providing an aqueous solution of a mixture of metal or metalloid salts;
- (c) passing the gaseous silicon compound through the aqueous solution to form silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A display device comprising a phosphor prepared by a method comprising:
- (a) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (b) providing an aqueous solution of a mixture of metal or metalloid salts;
- (c) passing the gaseous silicon compound through the aqueous solution to form silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A phosphor prepared by a method comprising:
- (a) providing a mixture of metal or metalloid compounds in the solid state;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) passing the gaseous silicon compound over the mixture of metal or metalloid compounds in an amount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A display device comprising a phosphor prepared by a method comprising:
- (a) providing a mixture of metal or metalloid compounds in the solid state;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) passing the gaseous silicon compound over the mixture of metal or metalloid compounds in an amount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates under conditions effective to form a phosphor.
2 more elements
A method for preparing a silicate-containing phosphor comprising:
- (a) providing a mixture of oxygen containing metal or metalloid salts which include metals of Groups IA and IIA, the transition metals, the lanthanides and actinides, and metals and metalloids of Groups IIIA, IVA, and VA;
- (b) providing a gaseous silicon compound selected from the group consisting of a silicon hydride, a silicon halide, and a silicon hydride halide;
- (c) combining the mixture of metal or metalloid salts with the gaseous silicon compound in an amount sufficient to convert the compounds to silicates;
- and
- (d) heating the silicates at a temperature of about 1000.degree.-1500.degree. C. to form a phosphor.
2 more elements
Dependencies are inferred from the claim text.