Thermal characteristics, Raman spectra, optical and structural properties of TiO2-Bi2O3-B2O3-TeO2 glasses
Thermal characteristics, Raman spectra, optical and structural properties of TiO2-Bi2O3-B2O3-TeO2 glasses
复制标题
DOI：
10.1063/1.4980440
复制
发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Nupur Gupta;A. Khanna;F. González;R. Iordanova
中科院分区：
文献类型：
--
作者：
Nupur Gupta;A. Khanna;F. González;R. Iordanova
制备了含Bi 2 O3和TiO 2的碲酸盐和硼碲酸盐玻璃，并通过密度测量、X射线衍射（XRD）、差示扫描量热法（DSC）、拉曼光谱和紫外-可见光谱对其结构与性能进行了关联。钛碲酸盐玻璃需要高的熔体冷却速率，并通过溅射淬火制备。加入B_2O_3后，玻璃形成能力增强，可以在较低的淬冷速率下合成玻璃。玻璃的密度与组分的分子质量直接相关。紫外-可见光研究用于确定光学带隙和折射率。拉曼研究发现，随着B2 O3和Bi 2 O3含量的增加，碲离子与氧的配位数（NTe-O）减少，而TiO 2只产生少量的NTe-O，这解释了不含Bi 2 O3和B2 O3的钛碲酸盐玻璃的较低GFA。DSC研究表明，玻璃化转变温度（Tg）随着B2的增加而增加。
Tellurite and borotellurite glasses containing Bi2O3 and TiO2 were prepared and structure-property correlations were carried out by density measurements, X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Raman and UV-visible spectroscopy. Titanium tellurite glasses require high melt-cooling rates and were fabricated by splat quenching. On adding B2O3, the glass forming ability (GFA) enhances, and glasses could be synthesized at lower quenching rates. The density of glasses shows a direct correlation with molecular mass of the constituents. UV-visible studies were used to determine the optical band gap and refractive index. Raman studies found that the co-ordination number of tellurium ions with oxygen (NTe-O) decreases with the increase in B2O3 as well as Bi2O3 content while, TiO2 produce only a small decrease in NTe-O, which explains the lower GFA of titanium tellurite glasses that do not contain Bi2O3 and B2O3. DSC studies show that the glass transition temperature (Tg) increases with B2...