Microstructural characterization and crystallization behaviour of (1−x)TeO2–xWO3 (x=0.15, 0.25, 0.3mol) glasses

Effect of rare-earth dopants on the thermal behavior of tungsten–tellurite glasses

“…In the literature, a similar behavior of peak splitting was observed by Öveç oglu et al [3] for the first endothermic peak corresponding to the eutectic reaction in 1.0 mol% Tm 2 O 3 containing TW15 glass. However, they reported that identical DTA curves were obtained for undoped and 1.0 mol% Tm 2 O 3 doped samples.…”

“…4). The first endothermic onset temperatures were determined at 619 ± 1 • C for all undoped samples corresponding to the binary eutectic reaction: liquid → ␣-TeO 2 + WO 3 of the TeO 2 -WO 3 system which was reported in the literature by several researchers [3,4,[23][24][25][26]. The second endothermic peaks observed in TW10 and TW15 samples were attributed to the liquidus reaction of the binary system [23][24][25].…”

“…increase the glass forming ability. Among heavy metal oxide containing tellurite glasses, tungsten-tellurite glasses exhibit various excellent properties such as doping in a wide range, modifying the composition by a third, fourth, and even fifth component which allows controlling the optical properties, enhancing the chemical stability and devitrification resistance [1][2][3][4]. It is known that the main drawbacks of tellurite glasses are their low glass transition temperature and relatively low-phonon energy.…”

“…Tellurite glasses doped with rare-earth ions have attracted a great deal of interest due to their advantageous properties over silicate, borate and phosphate glasses such as a wide transmission range from ultraviolet to mid-infrared, lowphonon energy, high refractive index, high dielectric constant and chemical stability [1][2][3][6][7][8][9][10]. The optical properties of different rare-earth element ions in tellurite based systems have been extensively studied for several years.…”

Investigation on thermal and microstructural characterization of the TeO2–WO3 system

“…Tellurite glasses have been investigated extensively due to their favorable physical and chemical properties such as, relatively lowphonon energy, high refractive index, high dielectric constant, good infrared transmissivity, low glass transition and melting temperature, thermal and chemical stability and high devitrification resistance [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Owing to these numerous properties, tellurite glasses have become preferable host materials for some infrared and infrared to visible upconversion applications in optical data storage, lasers, sensors and spectroscopic devices [5][6][7][8]11,[14][15][16][17][18][19][20].…”