Thermal and microstructural characterization and crystallization kinetic studies in the TeO2−B2O3 system

The TeO2‐Na2O System: Thermal Behavior, Structural Properties, and Phase Equilibria

“…Compared with SiO 2 , P 2 O 5 , B 2 O 3 , and GeO 2 ‐based glass systems, relatively low‐phonon energy, high refractive index, high dielectric constant, and good infrared transmissivity are some of the advantageous properties that make tellurite glasses ideal matrices for amplifier mediums and laser hosts. Moreover, their relatively low glass transition and melting temperature, thermal and chemical stability, and high devitrification resistance provide ease of manufacturing and durability …”

“…Therefore, preparation of tellurite glasses requires addition of a secondary component as TeO 2 acts as a conditional glass former under normal quenching conditions such as casting in metal molds/plates or dipping in water bath. Heavy metal oxides, halogens, or alkali oxides can be used as secondary components to make TeO 2 form a network structure or in other words vitrify . It is known that properties of a glass are directly related to the quantity and the nature of its constituents.…”

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

“…Tellurite glasses show relatively low-phonon energy (600-850 hw/cm), high refractive index (1.8-2.3), high dielectric constant , good infrared transmissivity (5.5 lm), low glass transition (~300°C), and melting temperature (below 1000°C), thermal and chemical stability, and high devitrification resistance. [1][2][3][4][5][6][7][8][9][10] Unlike classical glass-forming oxides (SiO 2 , B 2 O 3 , P 2 O 5 , GeO 2 ), TeO 2 does not have glass-forming ability under normal quenching conditions without addition of a secondary component, such as alkalis, heavy metal oxides, and halogens. [1][2][3][4][5][6][7][8][9][10] Combination of TeO 2 with two or more secondary components yields stable glasses and provides control of the desired properties.…”

“…Until today silicate, borate, and phosphate glasses were preferred as ideal glass matrices; however, recent studies concentrate on tellurite and chalcogenide glasses due to their advantageous properties. Tellurite glasses show relatively low‐phonon energy (600–850 ħw/cm), high refractive index (1.8–2.3), high dielectric constant (13–35), good infrared transmissivity (5.5 μm), low glass transition (~300°C), and melting temperature (below 1000°C), thermal and chemical stability, and high devitrification resistance …”

“…Unlike classical glass‐forming oxides (SiO 2 , B 2 O 3 , P 2 O 5 , GeO 2 ), TeO 2 does not have glass‐forming ability under normal quenching conditions without addition of a secondary component, such as alkalis, heavy metal oxides, and halogens . Combination of TeO 2 with two or more secondary components yields stable glasses and provides control of the desired properties.…”