Study On Preparation And Properties Of Rare Eearth Doped Li₂O-B₂O₃-SiO₂System Glass-ceramics

system glass ceramic was prepared by melting crystallization method and P2O5and TiO2as compound nucleating agent in this system. The best proportion of raw material was determined. the heat treatment of the base glass was determined by DSC analysis; the crystalline phase of the glass ceramic was determined by XRD, it shows that the main crystalline phase of galss-ceramics is Li2SiO3(29-0828), and the other phase of samples is the SiO2(75-1555); according to the SEM results,it shows that the crystal shape is round, the grain size is substantially in100nm; the light transmittance curve shows that the transmittance of the glass ceramic samples can reach82%; and discussed the influence to heat treatment and grain size after the rare earth were doped.The fluorescence spectroscopy of the thulium ion or ytterbium ion doped in Li2O-B2O3-SiO2system glass ceramic were discussed, the results shows that thulium ions has strong emission band corresponding,it corresponding to transition of thulium ions1D2â†'3F4, the optimum concentration of thulium doped was determined it was2%; and Ytterbium-doped ion concentration is5%; The fluorescence spectroscopy of Thulium, ytterbium co-doped has two strong emission peak at474nm (blue) and651nm (red), Respectively, it was corresponding to the transition of Tm ion1G4â†'3H6and1G4â†'3F4. The optimum doped concentration of glass ceramics was fixed, thulium is1%, ytterbium ion is6%.