采用高温熔融的方法,在空气中制备了一系列添加不同网络修饰体氧化物的Eu2 O3和Dy2 O3共掺杂铝硼硅酸盐玻璃,并测试了其在紫外光激发下的发光性能.从发射谱中可以看到归属于Eu2+、Eu3+和Dy3+离子能级跃迁的蓝、绿、黄、红等多色发射带共存.这些发射带之间的相对强度会随着网络修饰体氧化物的改变而变化,从而导致发光色度的变化.加入适当的网络修饰体氧化物可得到合适的白光发射.此外,在空气中制备过程中发生了Eu3+→Eu3+的还原反应.用Li2O取代ZnO时,该还原反应程度降低,而用CaO取代BaO时该还原反应程度增强,其机制与玻璃组分的光碱度有关.
Present work prepared a series of Eu2O3 and Dy2O3 co-doped aluminoborosilicate glasses with different network modifier addition by melting and annealing method.The emission spectra of these samples had been measured under UV light excitation.A combination of blue,green,yellow and red emission bands ascribed to transitions for Eu2+,Eu3+and Dy3+ions was shown for these glasses.It presented that the relative emission in-tensity could be adj usted with different network modifier oxides,and resulted in the change of luminescence col-or.White light emission could be obtained by appropriate network modifier oxides addition.Interestingly,it should be noted that the coexistence of Eu3+and Eu2+ions in the aluminoborosilicate glasses was observed ac-Cording to emission spectra.The Eu3+→Eu2+reduction degree decreased by substituting Li2O for ZnO,while it increased by substituting CaO for BaO.The change was discussed with the different optical basicity of the com-ponents.
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