PHOSPHOR AND METHOD FOR PREPARATION OF THE SAME

PROBLEM TO BE SOLVED: To provide a phosphor which uses easily available LED as an excitation light source, enlarges the range of the excitation light from a ultraviolet to visible region and emits a light in a wide range from red to blue green. SOLUTION: The phosphor contains gallium oxide, an oxide...

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Bibliographic Details
Main Author MIYASHITA SHIGENORI
Format Patent
LanguageEnglish
Published 13.07.2006
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:PROBLEM TO BE SOLVED: To provide a phosphor which uses easily available LED as an excitation light source, enlarges the range of the excitation light from a ultraviolet to visible region and emits a light in a wide range from red to blue green. SOLUTION: The phosphor contains gallium oxide, an oxide or a sulfide of an alkaline earth metal, an europium compound and sulfur or a sulfur compound. The preparation process comprises mixing gallium oxide, europium oxide and an oxide of an alkaline earth metal in a mole ratio of (3.5-6.5):(0.05-0.5):(1-3) and subsequently heat-treating at 600°C or higher in a reducing atmosphere containing sulfur. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20050345232