ULTRAVIOLET- OR VACUUM-ULTRAVIOLET-EXCITABLE BLUE PHOSPHOR

PROBLEM TO BE SOLVED: To provide an ultraviolet- or vacuum-ultraviolet-excitable blue phosphor of a new type which is minimized in the degradation in luminescent efficiency or change in color purity with time. SOLUTION: A blue phosphor is provided which emits light by the excitation with ultraviolet...

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Bibliographische Detailangaben
Hauptverfasser:	ONISHI TAKAYUKI, KIMURA KATSUAKI, YOKOTA KANEYOSHI, CHO SHOSHU
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an ultraviolet- or vacuum-ultraviolet-excitable blue phosphor of a new type which is minimized in the degradation in luminescent efficiency or change in color purity with time. SOLUTION: A blue phosphor is provided which emits light by the excitation with ultraviolet rays or vacuum-ultraviolet rays and is represented by the formula: (Ma-xEuxOa).(Mgb-yLyOb).(Alc-zTzO1.5c), wherein M is at least one kind of element selected from among Ba, Sr, and Ca; 0.4