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Sodium Carbonate Flux Effects on the Luminescence Characteristics of (Y 0.5 Gd 0.5 ) 2 O 3 :Eu Phosphor Particles Prepared by Spray Pyrolysis
Author(s) -
Kang Yun Chan,
Roh Hyun Sook,
Park Seung Bin
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00675.x
Subject(s) - phosphor , spray pyrolysis , photoluminescence , pyrolysis , flux (metallurgy) , luminescence , materials science , sodium carbonate , analytical chemistry (journal) , emission intensity , chemical engineering , intensity (physics) , particle size , mineralogy , nuclear chemistry , sodium , chemistry , doping , metallurgy , chromatography , optics , optoelectronics , physics , engineering
Na 2 CO 3 flux was introduced in the preparation of phosphor particles by spray pyrolysis to improve the photoluminescence (PL) characteristics of (Y 0.5 Gd 0.5 ) 2 O 3 :Eu phosphor particles. The phosphor particles directly prepared by spray pyrolysis at 1300°C from solutions with 20 wt% Na 2 CO 3 flux had the highest PL intensity, which corresponded to 130% of that of particles prepared from solution without flux. On the other hand, the maximum PL intensity of the annealed particles, which were as‐prepared at 900°C and posttreated at 1200°C for 3 h, was obtained from a solution with 5 wt% Na 2 CO 3 flux. The maximum PL intensity of particles directly prepared by spray pyrolysis without posttreatment was 86% of that of posttreated phosphor particles. Na 2 CO 3 flux was also important in control of morphology of (Y 0.5 Gd 0.5 ) 2 O 3 :Eu phosphor particles.