Glass Formation and Characterization Studies in the TeO₂–WO₃–Na₂O System

Abstract

Glass formation behavior of the TeO2–WO3–Na2O system was studied by using conventional melt‐quenching technique. A wide glass formation range was determined for the first time in the literature and thermal, physical, and structural characterization of sodium‐tungsten‐tellurite glasses were realized using differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy techniques. Glass transition (Tg) and crystallization (Tc/Tp) temperatures, glass stability (∆T), density (ρ), molar volume (VM), oxygen molar volume (VO), and oxygen packing density (OPD) values and structural transformations in the glass network were investigated according to the equimolar substitution of TeO2 by Na2O+WO3 and changing Na2O or WO3 at constant TeO2.

Enhanced photoluminescence property and mechanism of Eu3+‐doped tellurite glasses by the silver and gold nanoparticles

“…The Ag + ions further transform into the Ag nanoparticles after the heat treatment. Previous investigation demonstrated that the W–O − nonbridging oxygen was formed in the TeO 2 –WO 3 –Na 2 O . The formation of Ag nanoparticles in the tellurite glass may be related to the presence of the W–O − .…”

“…Previous investigation demonstrated that the W-O À nonbridging oxygen was formed in the TeO 2 -WO 3 -Na 2 O. 46 The formation of Ag nanoparticles in the tellurite glass may be related to the presence of the W-O À . The Ag + ions were reduced to Ag 0 by the W-O À during the heat treatment, and many Ag 0 were aggregated and grown into Ag nanoparticles.…”

“…In contrast to other tellurite glass without the WO 3 , the tellurite glass with the WO 3 has the higher glass transition temperature and thermal stability. 46 Additionally, the addition of WO 3 in the tellurite glass provides many advantages such as doping in a wide range, enhancing the chemical stability and devitrification resistance of the tellurite glasses. 47,48 In the present work, the tellurite glasses with WO 3 were prepared by the traditional melted method.…”

Preparation and photoluminescence enhancement of Au nanoparticles with ultra‐broad plasmonic absorption in glasses

“…The formation of Au nanoparticles in the tellurite glass may be related to the presence of the W–O − . Çelikbilek et al reported that the non‐bridging oxygen species W–O − was formed in the TeO 2 –WO 3 –Na 2 O glasses which were characterized by the FT‐IR spectra . Gold ions were introduced into the glass host by AuCl 3 during the heat treatment.…”

Electronic polarizability and interaction parameter of gadolinium tungsten borate glasses with high WO3 content

“…For instance, Maaß et al [23] proposed that Raman bands at 250 to 970 cm À 1 observed in Li 2 B 4 O 7 -WO 3 glasses are due to WO 4 2 À tetrahedral units and the presence of W 2 O 7 2 À structure. Celikbilek et al [24] suggested the presence of both WO 4 and WO 6 units in Na 2 O-WO 3 -TeO 2 glasses from Fourier transform infrared spectra. Gugov et al [25] also proposed the presence of WO 4 and WO 6 units in TeO 2 -WO 3 glasses from Raman scattering spectra.…”