Preparation And Spectral Properties Of Eu³⁺-Doped Borate Glass

Different systems and compounds of glass were got by fusion method under high temperature in this study. These glass all were doped with Eu³⁺ ions. Spectral properties of these glass were got by measuring their absorption or transmitted, excitation and fluorescence spectrum. Spectral properties of Eu³⁺ doped borate glass were known by computing based on the theory of J-O and the data tested about Eu³⁺ doped borate glass.The results show spectral properties of Eu³⁺ ions are the excellentest in borate glass, then in silicon glass and phosphate glass. Based on the above results, Eu³⁺ doped borate glass was choosen and its main compositions were SiO2,Al₂O₃ and B₂O₃, then approving its physical,chemical,mechanical and spectral properties by being doped with Li2O,Na2O,K2O,MgO,CaO,SrO,Y₂O₃,Dy₂O₃,Tb₂O₃ and so on.The results indicate that fluorescence spectral components of Eu³⁺ doped borate glass mainly are ⁵D₀→7F(1590nm),⁵D₀→7F(2617nm)and ⁵D₀→7F(4699nm),the strongest peak at ⁵D₀→7F2. The excitation spectra at 618nm mainly contain Charge Transfer State(CTS),240³00nm,absorption transition from 7F0 to 5DJ(J=1,2,3,4,5,6) and higher energy levels, and the key peak at 390nm(from7F0 to 5L6). The result shows wavelength in red band (⁵D₀→7F2) is different in different host because of alkali metal ions and alkali earth metal ions doped. The intensity gradually increases by SrO→CaO→MgO or K2O→Li2O→Na2O. Rare-earth ions co-doped also affects on the spectrum properties of Eu³⁺ doped borate glasses. The result shows its spectrum properties can be improved by separately introducing Dy³⁺ or Y³⁺ ions to Eu³⁺ doped glass. On the contrary, it makes the properties bad to dope several kinds of Rare-earth ions together.