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

Abstract

Ternary tellurite based glasses in the (TeO2)(ZnO)(TiO2) system were prepared and its optical properties and crystallization kinetics investigated by using UV‐VIS spectrophotometer and differential thermal analyzer (DTA). All the glasses were transparent from visible to near infrared region for different ZnO glass compositions (x=0.05, 0.10, 0.20, and 0.30 mol). In the experiment, optical band gap and Urbach energies were estimated from the optical absorption spectra between 400 and 800 nm wavelength region. The observed results confirm that the addition of ZnO glass composition from 0.05 to 0.30 mol increases the optical band gap energy from 2.94 to 3.0 eV. In addition, glass transition (Tg), crystallization (Tp) and melting temperature (Tm) were determined by using the DTA plots. Finally, DTA results obtained with a heating rate of 20°C/min show that the peak crystallization temperature increases from 463 to 533 °C as the ZnO content increases from 0.05 to 0.30 mol (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

XRD, SEM, Thermal and Optical Properties of TeO 2 -ZnCl 2 -Nb 2 O 5 -TiO 2 Based Glass System According to Preparation Temperatures

“…have found a better Hrubi parameters, Kg1 to be 0.89 for a special glass sample TeO2-ZnO-TiO2 where TeO2 component to be 0.75, ZnO component to be 0.20 mol content and TiO2 component to be 0.05 content of amount [2].…”

“…From this analysis, the sample TZNT5 can be considered to be more stable for glass formation in case of considering optical applications. The glass tendency was calculated using the equation [2], [15].…”

“…have developed a tellurite based optical glass materials where they have found the optical bandgap (Eg) was increased upto 3.0 eV. The glass transition (Tg), bandgap (Eg), crystallization properties got extremely effected by the enhancement of boron compounds in the glass network [2]. Furthermore, Kabalci et al have found glass tendency (Kg1) to be nearly 2.01 where the hardness properties get increased with respect to increase the ration Al2O3 [3].…”

“…Masai et al have made experiment on Tin doped borate glass for photoluminescence where they found the quantum efficiency to be 60% [4]. Again, Kabalci et al have analyzed a tellurite glass materials by using UV-VIS spectrophotometer where the optical direct band gap was derived up to 3 eV, and the indirect band gap also enhanced up to 2.74 eV [2]. Kumar have analyzed barium doped strontium stannate glass for Rietveld refinement of XRD and UV-VIS analysis for optical, dielectric and electrical applications, where they have found the direct bandgap up to 3.97 eV and the indirect band gap to be 3.5 eV for which is suitable for UV detector and electronic device and conduction device application, where the band gap was found the direct bandgap up to 3.97 eV and the indirect band gap to be 3.5 eV [5].…”

Optical Absorption of Er³⁺/Nd³⁺ Co-Doped Tellurite Glass

“…4(a) shows the variation of ln(ߙ) with the photon energy. The values of Urbach energy are calculated by determining slopes of the linear regions of the curves at lower photon energies and taking their reciprocals corresponding to the expression given by [12,16],…”