Preparation And Properties Of Dy³⁺/Tb³⁺ Doped Luminescence Glass Ceramics Containing SrWo₄ Crystal

In this paper,Tb³⁺ mono-doped,Dy³⁺ mono-doped and Dy³⁺/Tb³⁺ co-doped transparent glass ceramics containing Sr WO4 crystal were successfully synthesized by meltcrystallization method.The optimum heat treatment temperature and time of Tb³⁺ monodoped,Dy³⁺ mono-doped and Dy³⁺/Tb³⁺ co-doped glass ceramics samples were determined by XRD,SEM and transmittance curves,which were 730?/2 h,740?/1.5 h and 710?/1.5 h,respectively.The influences of different Dy³⁺ and Tb³⁺ concentration to the fluorescence intensity of rare-earth doped glass ceramics samples were discussed.The optimum concentrations of Tb₄O₇,Dy₂O₃ and Dy₂O₃/Tb₄O₇ were determined,whose mole percentages were 1.0%,0.8% and 0.8%/1.9%.By calculating their critical distance,the energy transferring machines of Tb³⁺ mono-doped and Dy³⁺ mono-doped glass ceramics samples were studied,the principles of their concentration quenching were determined.The fluorescence lifetime of Tb³⁺ mono-doped,Dy³⁺ mono-doped and Dy³⁺/Tb³⁺ co-doped glass ceramics samples were calculated.Combining luminescence spectra with decay curves,the energy transferring phenomenon was found,which was of Dy³⁺ to Tb³⁺.With the Tb³⁺ concentration increase,the efficiency of energy transferring increased gradually,however the lifetime of Dy³⁺ decreased gradually and the green light was obtained converting from light green to dark green.Therefore,Tb³⁺ mono-doped and Dy³⁺/Tb³⁺ co-doped glass ceramics samples had potential application in green light laser.