关键词: 微波合成, 稀土磷酸盐, 微晶玻璃, 玻璃态, 发光材料

Abstract: In this paper,we report a new route to syntheses of a series of pure luminescent materials of rare earth phosphates with crystalline phase,microcrystalline glass and glass using microwave method under the condition of appearance microwave power at 20%～70% level(100% power is equal to 650 W of microwave energy, adjusting at 10 level) and reaction time at 7～10 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 Vion 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)O₄:Eu_0.05 is 80 times more than that of the sample without Vion.

Key words: Microwave synthesis, Rare-earth phosphates, Micro-crystalline glass, Glass state, Luminescent materials