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The long-lasting phosphorescent glass with the composition of ZnO–P 2 O 5 –SiO 2 : Tb 3+  was prepared by melt-quenched method. After irradiation by 254 nm light, a visible greenish light can be observed with the naked eyes, in the dark for up to 9 h after removal of the activating light. The luminescent properties of ZnO–P 2 O 5 –SiO 2 : Tb 3+  were studied by fluorescence spectra, afterglow spectra and thermoluminescence spectra. The results show that the luminescent properties of the glasses become better with the increase of ZnO contents. The luminescent properties of glasses increase with the increase of Tb 3+  contents. When 2% of ZnO is replaced by 2% of RO (RO=CaO, SrO, BaO), the luminescent property of glasses become worse in the order of CaO, SrO, BaO. The higher the contents of RO (RO=CaO, SrO, BaO) are, the worse the luminescent properties of the glasses become.

Long-Lasting Phosphorescent Properties of Tb 3+ Doped ZnO–P 2 O 5 –SiO 2 Glasses