Compositional analysis of powder of metal oxide phosphor using particle analyzer

Abstract

We synthesized Y ₂O₃:Eu red phosphor using powders of metal -EDTA complexes as a starting matreial. Powders of metal -EDTA complexes were obtained from solution consisting of Y- and Eu-EDTA·NH₄ using a spray dryer. The compositional analysis among obtained particles was performed using a particle analyzer. The metal composition was scattered for the powder of the metal -EDTA mixture, while it became narrow for the Y ₂O₃:Eu powder synthesized with the splay -dried EDTA mixture. The intensity of cathodoluminescence obtained from the Y ₂O₃:Eu powder increased with increasing the fired temperature. The maximum intensity was obtained from the sample with x=0.12 for Y _2-xO₃:Eu_x.