Fluorescent nanometer rare earth oxide powder and its preparation

The present invention relates to nanometer fluorescent powder activated by trivalent rare earth ion. The nanometer fluorescent powder has the composition of (Ln1-xRx)2O3, where Ln is Y, La, Gd or Lu and R is other trivalent rare earth activator. The precusor is first prepared through combined homoge...

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Bibliographische Detailangaben
Hauptverfasser:	XINGREN LIU, DUODUO MA, YIHUI PEI
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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Beschreibung
Zusammenfassung:	The present invention relates to nanometer fluorescent powder activated by trivalent rare earth ion. The nanometer fluorescent powder has the composition of (Ln1-xRx)2O3, where Ln is Y, La, Gd or Lu and R is other trivalent rare earth activator. The precusor is first prepared through combined homogeneous urea precipitation process and supersonic chemical process and then burned at 900-1500 deg.c in the air for 0.5-3 hr to decompose it to obtain the nanometer fluorescent powder of the present invention. The new type nanometer fluorescent powder may be used in CRT, FED, PDP, fluorescent lamp, flashing ceramic, etc.