Ta_(2)O_(5)对碲铋酸盐玻璃光学性能的影响  

Effect of Ta_(2)O_(5) on Optical Properties of Tellurium Bismuthate Glass

作　　者：李佳航 俞佳 胡美凤 曾惠丹[1] 刘小峰[2] LI Jia-hang;YU Jia;HU Mei-feng;ZENG Hui-dan;LIU Xiao-feng(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237 [2]浙江大学材料科学与工程学院,浙江杭州310027

出　　处：《发光学报》2022年第3期371-380,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51872092,52072122)资助项目。

摘　　要：通过高温熔融法制备了一系列(90-x)TeO_(2)-10Bi_(2)O_(3)-x Ta_(2)O_(5)(x=0%,2%,4%,6%,8%)TBT玻璃样品。拉曼光谱和X射线光电子能谱测试结果显示,随着Ta_(2)O_(5)的加入,玻璃网络中的[TeO_(3)]与[TeO^(3+1)]向[TeO_(4)]转变,玻璃网络结构更加致密。这解释了差示扫描量热法测试中TBT玻璃的玻璃化转变温度T_(g)随Ta_(2)O_(5)的含量增加而增加的变化原因。当Ta_(2)O_(5)从0升高到8%,吸收光谱以及光学带隙方程计算表明,玻璃样品的光学带隙和乌尔巴赫能(Urbach)不断降低。使用Z扫描方法测试了各个TeO_(2)-Bi_(2)O_(3)-Ta_(2)O_(5)玻璃样品的三阶非线性光学特性,结果表明,TBT玻璃的三阶非线性与Ta_(2)O_(5)的加入量呈正相关。当Ta_(2)O_(5)的加入量为8%时,其三阶非线性极化率为3.30×10^(-20) m^(2)·V^(-2)(2.36×10^(-12) esu),这表明该组成的碲铋酸盐玻璃在非线性光学领域具备潜在的应用价值。By using differential scanning calorimetry(DSC)method,this research indicates glass transition temperture(T_(g))of a series of(90-x)TeO_(2)-10Bi_(2)O_(3)-x Ta_(2)O_(5)(x=0%,2%,4%,6%,8%)(TBT)glass is increased with more Ta_(2)O_(5) added.The phenomenon of increasing T_(g)is mainly contributed to transformation of[TeO_(3)]and[TeO_(3+1)]to[TeO_(4)]units.And the structure changes result in highly dense glass network structure which is supported by Raman spectroscopy and XPS charactreizations.Based on results of absorption spectrum and optical band gap equation calculation,when Ta_(2)O_(5) increases from 0 to 8%,the optical band gap and Urbach energy of such glass samples show decresing trends.The third-order nonlinear optical properties of TBT glass demonstrate positive correlation with concentration of Ta_(2)O_(5) through Z-scan measurement.The TBT glass with 8%Ta_(2)O_(5) has 3.30×10^(-20) m^(2)·V^(-2)(2.36×10^(-12) esu)of third-order nonlinear susceptibility.Thus,the outstanding properties of TBT glasses pave a way of nonlinear optical applications.

关 键 词：碲酸盐玻璃 氧化钽 非线性光学 

分 类 号：TQ171.733[化学工程—玻璃工业]