SILICATE PHOSPHOR

PURPOSE:To improve the initial deterioration of the brightness and afterglow, by incorporating a particular trivalent element and a particular pentavalent element in predetermined amounts in a silicate phosphor contg. manganese as an activator. CONSTITUTION:A particular trivalent element and a parti...

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Bibliographic Details
Main Authors YOKOTA SHINJI, MIKAMI TOMOKI
Format Patent
LanguageEnglish
Published 09.02.1988
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DYES
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:PURPOSE:To improve the initial deterioration of the brightness and afterglow, by incorporating a particular trivalent element and a particular pentavalent element in predetermined amounts in a silicate phosphor contg. manganese as an activator. CONSTITUTION:A particular trivalent element and a particular pentavalent element are incorporated in a silicate phosphor contg. manganese as an activa tor. The trivalent element is indium or a combination of indium and boron, while the pentavalent element is at least one member selected from among arsenic, antimony, and bismuth. The trivalent element content is 1X10<-4>-2X10<-2> g-atom/mol, provided that the content is 1X10<-4>-1X10<-2> g-atom/mol when the trivalent element consists of only indium. The pentavalent element content is 3X10<-3> g-atom/mol or less, and the molar ratio of the trivalent element to the pentavalent element is 1.5 or more, thus according the aimed silicate phosphor.
Bibliography:Application Number: JP19860172881