碲铋铌系统玻璃热稳定性及光学带隙研究  

Thermal Characteristics and Optical Band Gap of TeO_2-Bi_2O_3-Nb_2O_5 Glasses

作　　者：王艳玲[1] 戴世勋[1] 周宇[1] 徐铁峰[1] 聂秋华[1] 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《武汉理工大学学报》2008年第11期5-7,19,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(60677015);省重点科技攻关项目(2006C11127);宁波市自然科学基金(2006A610020);浙江省教育厅资助课题(20061664);宁波大学王宽诚幸福基金

摘　　要：制备了组成为(95-x)TeO2-5Bi2O3-xNb2O5(x=0%,x=5%,x=10%,x=15%)的4组碲酸盐玻璃,测试了样品的密度、折射率、玻璃转变温度、玻璃析晶温度、吸收光谱和红外光谱。利用样品的吸收光谱计算了其直接允许跃迁、间接允许跃迁及能量带隙。讨论了Nb2O5含量对玻璃的折射率、热稳定性、光学带隙及能量带隙的影响。该玻璃系统具有较好的热稳定性和较大的折射率。光学带隙和能量带隙随Nb2O5含量的增大而减小。Abstract： A series of （95-x）TeO2-5Bi2O3-xNb2O5（x=0%,x=5%,x=10%,x=15%） glasses were prepared. The density, refractive index, the transition temperature, crystallization temperature, absorption spectra, IR spectrum of samples were measured. Direct and indirect allowed transitions were determined from the absorption spectra. Energy band gap was also measured. The effects of content of Nb2O5 on refractive index, stability, optical band gap and energy band gap of the glasses are discussed. This tellurite glass system has good thermal stability and large refractive index. The refractive index of the glasses increases with increasing Nb2O5 content.

关 键 词：碲酸盐玻璃 光学带隙 能量带隙 

分 类 号：O482.2[理学—固体物理] O433.51[理学—物理]