Physical and structural properties of glasses in the TeO2–TiO2–Nb2O5 system

Nonlinear optical susceptibility of multicomponent tellurite thin film glasses

“…They show a sharp absorption edge that is apparently blueshifted in the case of the films with respect to that of the bulk. Defining the absorption edge as the wavelength at which the absorbance is 0.5, 15 the edges are observed to occur at Ϸ 440 nm and Ϸ 390 nm, which corresponds to optical gaps of E B Ϸ 2.82 eV and E F Ϸ 3.18 eV, for bulk and film glasses, respectively. Bulk and film glasses have low absorption for wavelengths longer than their respective absorption edges.…”

“…This glass was obtained using standard melting methods from high purity reagents: TeO 2 ͑Alfa 99.99%͒, TiO 2 ͑Sigma Aldrich 99.99%͒, and Nb 2 O 5 ͑Alfa 99.9985%͒. The mixture was melted in a platinum crucible at a temperature of 740°C for 45 min, then heated up to 760°C for 5 min and finally poured onto a preheated brass plate, annealed 15 min at 400°C and cooled at 3°C min −1 down to room temperature 15 The composition and oxidation state of the cations present in the powder reagents and the bulk and film glasses were measured by x-ray photoelectron spectroscopy ͑XPS͒. XP spectra were recorded on a spectrometer equipped with a hemispherical electron analyzer and a Mg K␣ ͑h = 1253.6 eV͒ x-ray source ͑12 kV and 10 mA͒.…”

Niobium doped BGO glasses: Physical, Thermal and Optical Properties

“…Theoretically density is a linear function of composition and can be estimated additively for glass as ; where n i denotes number of oxygen atoms contributed by each oxide [7]. It is volume fraction occupied by anions in the network.…”

“…The glass BGO75-Nb10 exhibited least absorption and constant percent transmission up to 71 % for disk samples across 0.60 μm -2.5 μm in VIS-NIR region. This transmission efficiency is greater than binary BGO60 glasses [7]. Structural investigation of the lattice vibrations in glass system around cation environment can be performed through IR absorption along with complementary micro Raman spectra in the fingerprint range of 400 cm -1 -1300 cm -1 which is the subject of next investigation.…”

Optical properties and crystallization kinetics of (TeO2)(ZnO)(TiO2) glasses

“…1 Introduction Infrared and transparent tellurite glasses based on zinc oxide have been investigated because of their superior physical and chemical properties such as low-phonon energy, high refractive index, high dielectric constant, thermal and chemical stability [1][2][3][4][5][6]. In order to the above properties, tellurite based glasses show good glass network structure for optically active rare earth ions such as Er 3+ , Tm 3+ , and Yb 3+ [7][8][9].…”