Investigation of Infrared and Raman Spectra of TeO₂-Nb₂O₅-TiO₂Glasses

Abstract

X-ray diraction, infrared (IR), Raman spectroscopy and scanning electron microscope techniques have been used to investigate the microstructural properties of the glass materials. In this work, a new type of tellurite based optical glasses with TeO2/Nb2O5/TiO2 for dierent xNb2O5 (x = 5, 10, 15, and 20 mol.%) glass compositions at constant 5 mol.% TiO2 ratio were prepared. The eect of Nb2O5 contents on the structural unit of (95 − x)TeO2 (x)Nb2O55TiO2 glass network, and the intensity ratios of the Raman peaks were investigated. The results indicate that for dierent Nb2O5 content 5 to 20 mol.% in the glass system, three vibrational peaks around 650, 800, and 920 cm −1 which correspond to the structural bonding of the glass were observed in the range of 5002000 cmfor the IR spectra. Furthermore, from the Raman results a structural evolution was determined with the number of structural units such as [NbO6] 7− , TeO3+1 (polyhedra), TeO4 (trigonal bipyramids), TeO3 (trigonal pyramids) or TeO3+1 (polyhedra), and [NbO4] 3− for this ternary glass system.

Nano-silver enhanced luminescence of Er3+ ions embedded in tellurite glass, vitro-ceramic and ceramic: impact of heat treatment

“…16,18 Kabalci has also detected crystallization Nb 2 Te 4 O 13 peaks in the Nb 2 O 5 -TeO 2 system. 19 Fig. 2 shows the measured Raman spectra of untreated glass, vitro-ceramic and ceramic.…”

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

“…are introduced in the final chemical composition [17]. The main advantages of this kind of glasses are a wide transmission range from mid-IR to UV (from 350 to 5000 nm), good chemical and thermal stabilities, high non-linear refractive index, good solubility of RE 3 þ ions that allows high doping concentrations and, finally, their relatively low-energy phonons [18]. In this sense, an extensive study of the temperature behavior of the luminescence in Nd 3 þ -doped tellurite glasses has been previously done by Sobczyk [19].…”

Comparative Study of Selenides and Tellurides of Transition Metals (Nb and Ta) with Respect to its Catalytic, Antimicrobial, and Molecular Docking Performance

“…Significant transmission bands observed at 3432 and 1627 cm −1 are associated with the stretching frequency of O-H group [7]. In tellurides spectra C1 and C2, the observed intense peaks at 658 cm −1 correspond to the stretching vibrations of Te-O bonds in trigonal bipyramidal (tbp) TeO 4 units [67] while the vibrational band at 776 cm −1 reveals the existence of Ta-O-Ta bond in C1 [68] and NbO 4 tetrahedral unit in C2 [69]. Spectra of prepared selenide composites C3 and C4 indicate the presence of Se-O bonds due to stretching vibrational modes near 700 cm −1 [70] Peaks transmitted in the region of 700-900 cm −1 are assigned to the metal oxide bond as Ta-O-Ta bond [3] in C3 and Nb-O bond [69] in C4.…”