PREPARATION OF YTTRIUM-CERIUM-ALUMINUM GARNET PHOSPHOR
First Claim
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1. A method for preparing a yttrium-cerium-aluminum garnet phosphor comprising the steps of:
- combining yttrium, cerium and aluminum compounds to form a raw material in which cerium is present in a concentration of 4 mol % to 15 mol % based on the sum of yttrium and cerium, and a molar ratio of aluminum to the sum of yttrium and cerium is from 5/3 to 5.5/3,granulating the raw material into particles with an average particle size of 5 to 100 μ
m,melting the particles in a high-temperature plasma, andheat treating the resulting particles in a non-oxidizing atmosphere for crystallization.
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Abstract
A yttrium-cerium-aluminum garnet phosphor is prepared by mixing yttrium, cerium and aluminum compounds to form a raw material in which the Ce concentration is 4-15 mol % based on the sum of Y and Ce, and a molar ratio of Al to the sum of Y and Ce is 5/3 to 5.5/3, granulating the raw material into particles with an average particle size of 5-100 μm, melting the particles in a high-temperature plasma, and heat treating the resulting particles in a non-oxidizing atmosphere for crystallization.
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3 Claims
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1. A method for preparing a yttrium-cerium-aluminum garnet phosphor comprising the steps of:
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combining yttrium, cerium and aluminum compounds to form a raw material in which cerium is present in a concentration of 4 mol % to 15 mol % based on the sum of yttrium and cerium, and a molar ratio of aluminum to the sum of yttrium and cerium is from 5/3 to 5.5/3, granulating the raw material into particles with an average particle size of 5 to 100 μ
m,melting the particles in a high-temperature plasma, and heat treating the resulting particles in a non-oxidizing atmosphere for crystallization. - View Dependent Claims (2, 3)
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Specification