Eu^(3+)掺杂Bi_2O_3-PbO-B_2O_3-ZnO玻璃光谱性质  

Optical Spectra of Bi_2O_3-PbO-B_2O_3-ZnO Glasses Doped with Eu^(3+) Ions

作　　者：章践立[1] 夏海平[1] 王金浩[1] 张约品[1] 张新民[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211

出　　处：《发光学报》2006年第3期343-347,共5页Chinese Journal of Luminescence

基　　金：浙江省自然科学基金(502164);宁波大学重点学科基金(xk200418)资助项目

摘　　要：用高温融熔法制备了Eu3+掺杂浓度为1%的(60-x)B i2O3xPbO30B2O310ZnO(x=0,10,30,摩尔分数)玻璃。测定了玻璃的差热分析曲线、吸收光谱、声子边带谱、发射光谱与激发光谱。由发射光谱与稀土Eu3+离子光学跃迁矩阵元的特点,计算了Eu3+光学跃迁的J-O参数Ω2与Ω4。结果显示强度参数Ω2随着PbO量的增加而略减少,表明材料的对称性略增加,Eu—O键强减弱,共价性降低。PbO组分的增加,使玻璃的结晶起始温度与软化温度差降低,导致玻璃的热温度性变差。随着PbO的增加,电-声子耦合减弱。The Eu^3＋ -doped glasses are well known as technologically important material and have been used widely in laser, luminescent material, and optical data storage. The glass doped with rare earth （RE） with wide emission band is very important for their application in wide band communication and other fields. The wide emission band of RE-doped in Bi-based glass is expected due to the high reflective index of Bi. The （60 - x） Bi2O3xPbO30B2O310ZnO （ x = 0,10,30, tool fraction） glasses doped with Eu^3＋ in 1% were fabricated by melting method. The emission situation of other rare earth ions can be reflected from that of Eu^3＋ in the glass due to the similar size of ionic diameter and chemical properties. The DTA curves, absorption, phonon side-band, emission and excitation spectra of the glasses were measured. The Ω2 and Ω4 parameters of Eu^3＋ for optical transition were calculated from their emission spectra in terms of reduced matrix Uλ （ λ = 2,4,6） character for optical transitions. The results indicated that the intensity parameters Ω2 and Ω4 decrease slightly as the increase of PbO contents. It suggests that the symmetry becomes higher, the band of Eu and Oatoms becomes weaker and the covalency decreases slightly. The difference between glass transition temperature （Tg） and the crystallization onset temperature decreases as increase of PbO content, indicating that thethermal stability of the glass becomes worse. The electron-pbenon coupling becomes weaker as increase of PbO content.

关 键 词：EU^3+ 离子 Bi2O3-PbO-B2O3-ZnO 玻璃 强度参数 热稳定性 光谱 

分 类 号：O482.31[理学—固体物理] TB381[理学—物理]