A BLUE PHOSPHOR HAVING CHARACTERISTICS OF HIGH BRIGHTNESS FOR ACPEL AND MANUFACTURING METHOD THEREOF

A blue phosphor for an alternating current powder electroluminescence(ACPEL) is provided, which is excellent in brightness and has dark blue color of high quality similar to the natural color. And a process for producing the blue phosphor is also provided. The blue phosphor represented by the formul...

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Bibliographic Details
Main Authors LEE, ZEE YOUNG, YEO, CHANG HO, LEE, MYOUNG JIN, JEON, AE KYUNG, LEE, SUNG HO
Format Patent
LanguageEnglish
Published 22.03.2005
Edition7
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:A blue phosphor for an alternating current powder electroluminescence(ACPEL) is provided, which is excellent in brightness and has dark blue color of high quality similar to the natural color. And a process for producing the blue phosphor is also provided. The blue phosphor represented by the formula: ZnS:Cu,Cl comprises zinc sulfide as a matrix and copper and chlorine as coactivators, wherein the content of a copper ion is 0.0001-0.001mol based on the zinc sulfide of 1mol and color coordinates are x=0.15± 0.02 and y=0.18±0.04. And the blue phosphor is produced by the process containing the steps of: mixing the zinc sulfide, a compound containing the copper ion, and a compound containing a chlorine ion and pre-calcining at 400-800deg.C; calcining the resultant firstly at 950-1200deg.C; adding copper sulfate and zinc oxide to the resultant and calcining secondly at 500-1000deg.C; cleansing, drying, and classifying.
Bibliography:Application Number: KR20030064934