METHOD FOR PREPARING PHOSPHOR PRECURSOR AND PHOSPHOR, AND WAVELENGTH CONVERTER

The present invention relates to a manufacturing method of a phosphor precursor capable of obtaining more uniform composition for a phosphor. The phosphor precursor contains a garnet phase represented by the composition formula 1. In the formula 1, A is one or more kinds of rare-earth elements selec...

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Bibliographic Details
Main Authors KAWAZOE HIROFUMI, WATAYA KAZUHIRO
Format Patent
LanguageEnglish
Korean
Published 05.02.2014
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DYES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
SEMICONDUCTOR DEVICES
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Summary:The present invention relates to a manufacturing method of a phosphor precursor capable of obtaining more uniform composition for a phosphor. The phosphor precursor contains a garnet phase represented by the composition formula 1. In the formula 1, A is one or more kinds of rare-earth elements selected from Y, Gd, and Lu, B is Ce and/or Tb, 0.002<=x<=0.2, and C is Al and/or Ga. The method comprises a step of suspending γalumina particle the BET specific surface is 50 m^2/g or higher, simultaneously adding urea into a suspension solution in which the rare-earth element salts are dissolved, and heating the same to form the mixed particle of γalumina particle and the rare-earth element salts; a step of separating the mixed particle from the suspension solution after heating; sintering the mixed particle at 1,000°C or lower to obtain the mixed particle oxide of a rare-earth element oxide and alumina.
Bibliography:Application Number: KR20130086598