Europium-doped yttrium aluminum garnet (YAG) phosphor
particles were prepared from mixed nitrate solutions
by the FEAG (filter expansion aerosol generator) process.
The crystallinity, morphology, and luminescence of the
YAG:Eu particles were investigated. The prepared particles
had an amorphous phase, which turned into phase-pure
YAG particles after annealing above 1000°C. A cubicstructure
YAG phase was formed by the reaction of crystalline
Y2O3 and the aluminum component. The prepared
particles had spherical morphology. The mean size of the
YAG:Eu particles increased from 0.45 to 1.0 μm when the
overall solution concentrations were increased from 0.02 to
1.2 mol/L. The optimum doping concentration of europium
for the maximum brightness of phosphor particles was 1.3
at.%. The cathodoluminescence (CL) intensity was strongly
affected by the annealing temperatures. The maximum CL
value of the particles was 55 cd/m2.