Microwave synthesis of luminescent materials of rare-earth phosphates

In this paper, we report a new route to syntheses of a series of pure luminescent materials of rare earth phosphates with crystalline phase, micro-crystalline glass and glass using microwave method under the condition of appearance microwave power at 20%similar to 70% level (100% power is equal to 650 W of microwave energy, adjusting at 10 level) and reaction time at 7 similar to 10 min. The molar ratio of Re2O3 and P2O5 plays an important role for the formation of the luminescent materials of crystalline phase, micro-crystalline glass and glass. The crystal structures were characterized by X-ray diffraction. The infrared spectra of these luminescent materials formed under microwave condition showed that the NO3-, NH4+ and H2O species in the starting mixture were completely removed, giving pure luminescent materials for crystalline phase, micro-crystalline glass and glass. The luminescent properties were investigated by fluorescence emission and excitation spectra. The experiment results show that the V ion in the substrate is sensitive to Eu3+, Dy3+, Sm3+, Tb3+ increasing the luminescent intensity, for example, the emission intensity of the sample Y-0.95(V-0.03, P-0.97)O-4:Eu-0.05 is 80 times more than that of the sample without V ion.