(M,M′)O-Al_2O_3-SiO_2:Eu^(3+),Bi^(3+)的发光

Luminescence of (M,M')O-AI_2O_3-SiO_2:Eu,Bi

用分析纯试剂经提纯制备的CaCO_3,SrCO_3,BaCO_3,Li_2CO_3,Al_2O_3,SiO_2,Bi_2O_3,Eu_2(C_2O_4)_3为原料,通过固态反应合成了(M,M′)_(1.920)O·0.1Al_2O_3·1.5SiO_2:Eu_(0.025)^(3+),Bi_(0.04)^(3+)(M,M′为Ca^(2+),Sr^(2+),Ba^(2+)中的任两种)系列发光材料。研究了基质的化学组成对Bi^(3+)敏化Eu^(3+)发光特性的影响规律。实验结果表明,激发Bi^(3+)时Eu^(3+)的发射谱线的分裂和~5D_0—~7F_2/~5D_0—~7F_1跃迁强度比值都受基质阳离子半径的较大影响。各组阳离子组合时Bi^(3+)都能敏化Eu^(3+)的发光。Eu^(3+)的发射以~5D_0—~7F_2跃迁为主,~5D_0—~7F_1跃迁强度较弱。

The Luminophors of alkaline earth aluminosilicates (M,M')_(1.920)O_(0.1)Al_2O_3 1.5SiO_2:Eu_(0.025)Bi_(0.04)(M,M' are two of Ca, Sr, Ba) series were synthesized by solid state reactions. The effects and regularities of alkaline earths on the luminescence properties of Eu^(3+) ion were investigated by varying the kinds of M and/or M' under excitation into Bi^(3+) ions.