Preparation And Characterazition Of Long-afterglow Luminescence Materials

This thesis review the history of long-lasting phosphorescent powder materials and glass materials comprehensively, presents their recent progress and summarizes the long-lasting phosphorescent mechanism. On the basis of this summarization CaWO₄:Eu³⁺ red long-lasting powder materials and (60-y)ZnO-(40-x)B₂O₃-xSiO₂-yAl₂O₃:Mn²⁺ red long-lasting glass materials were prepared by solid reaction method and melting method at high temperature respectively.Effects of concentrations of Eu³⁺ doping, synthesized condition on CaWO4:Eu³⁺ powder materials were studied. Effects of the change of base glass, concentrations of Mn²⁺ doping and fluxing agents, co-doped ions on the phosphorescence properties of Mn²⁺ activated (60-y)ZnO-(40-x)B₂O₃-xSiO₂-yAl2O₃ glass were discussed. XRD, IR-spectra, fluorescece spectra and thermoluminescence spectra were adopted to investigate the structure and properties of the samples. The optimum compose of the CaWO₄:Eu³⁺ aferglow powder material and long-lasting glass material were gained, and the optimum condition of sintering the CaWO₄:Eu³⁺ aferglow powder material was determined.