SILICON AND/OR GERMANIUM DIOXIDE SUBSTITUTED MANGANESE ACTIVATED MAGNESIUM ALUMINATE GALLATE PHOSPHOR

1,248,373. Luminescent materials and uses thereof. TOKYO SHIBAURA ELECTRIC CO. Ltd. 7 May, 1970 [9 May, 1969; 16 May, 1969], No. 22041/70. Heading C4S. A blue-green emitting phosphor is of formula xMgO.(1-y-z)Ga 2 O 3 .yAl 2 O 3 .zMO 2 .pMnO, where MO 2 is GeO 2 and/or SiO 2 , 0À70 # x # 1À05, 0À025...

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Bibliographische Detailangaben
Hauptverfasser:	TAIICHI INOUE, TOSHIMASA UEDA
Format:	Patent
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	1,248,373. Luminescent materials and uses thereof. TOKYO SHIBAURA ELECTRIC CO. Ltd. 7 May, 1970 [9 May, 1969; 16 May, 1969], No. 22041/70. Heading C4S. A blue-green emitting phosphor is of formula xMgO.(1-y-z)Ga 2 O 3 .yAl 2 O 3 .zMO 2 .pMnO, where MO 2 is GeO 2 and/or SiO 2 , 0À70 # x # 1À05, 0À025 # y # 0À4, 0 < z #0À3 and 0À001 # p # 0À05. Preparation may be by two-stage firing in oxidizing and reducing atmospheres (H 2 -N 2 ) at 1150 to 1475 C. and 1050 to 1250 C. respectively, the second firing ensuring divalent Mn. The preparation is described for xMgO.(1-y-z)Ga 2 O 3 .yAl 2 O 3 .zMO 2 .pMnO, where M=Ge or Si, x=0À95; p=0À01 and z=0À01, 0À05, 0À1, 0À2, 0À3, for y=0À025, 0À04, 0À1, 0À25, 0À4. Applications to electronic copying devices and colour T.V. tubes are exemplified.