Influence of Molten Salt on Luminescent Intensity and Particle Size of Y2 O3 :Eu3+ Phosphor

The Y-Eu oxalate precursor was prepared with a homogeneous precipitation method. And the additives, Na2CO3, S, NaCl or their combination, were introduced into the precursor to prepare Y2O3:Eu3+ red phosphors at 1000 ~ 1300 °C for 2 h. The effect of molten salts on particle size and luminescent intensity was studied. The experimental results showed that the complex molten salt (Na2CO3 + S + NaCl) was conductive to enhance the luminescent intensity of Y2O3:Eu3+. The emission intensity of the phosphor prepared with these additives at 1300 °C was about 45% higher than that of the one prepared without molten salt, and about 11% higher than that of the corresponding commercial phosphor. Meanwhile, the particle size of Y2O3:Eu3+ phosphor was controlled effectively with the molten salt.