A METHOD OF PREPAIRING A PHOSPHOR HAVING LONG DECAY TIME

PURPOSE: A process for preparing long decay-time fluorescent material for flicker-free cathode-ray tube is provided for accomplishing excellent brightness and obtaining it in high yield by means of simple and safe reproducible process. CONSTITUTION: The process for preparing long decay-time fluoresc...

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Bibliographic Details
Main Authors YOU, YONG CHAN, YUN, WON HO
Format Patent
LanguageEnglish
Published 01.08.2000
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:PURPOSE: A process for preparing long decay-time fluorescent material for flicker-free cathode-ray tube is provided for accomplishing excellent brightness and obtaining it in high yield by means of simple and safe reproducible process. CONSTITUTION: The process for preparing long decay-time fluorescent material useful in the production of flicker-free cathode-ray tube comprises adding terbium oxides such as TbO2 or Tb4O7 in the first solvent selected from nitric acid or hydrochloric acid to form the sub-active material; adding indium oxides such as In2O or In2O3 in pure water as the second solvent to form parent composition; mixing the sub-active material and the parent composition; adding base to the mixture to neutralize it and drying; adding boron component and the fusing agent selected from Li2B4O4, NaB4O7 separately or in combination of them to the mixture and calcining the resultant product.
Bibliography:Application Number: KR19970080257