Abstract
Glasses with chemical formula of {[(TeO2)0.7(B2O3)0.3]0.8[SiO2]0.2}1-x{MnO2}x where x = 0.00 †x †0.05 molar fraction were fabricated using melt quenching technique. The temperature used in the heat treatment process of the glass sample is 600?C. Calorimetric measurement had been carried out to study the thermal properties of the fabricated glass. The crystallization kinetics of the glass system we reexamined under non-isothermal conditions via differential scanning calorimetric (DSC). The glass transition (Tg), onset glass transition (To), maximum crystallization temperature (Tc) and melting temperature (Tm) were determined. Results from DSC proved that the studied glasses have good thermal stability (Ts) in which indicates its high resistance to devitrification. Strong indicator for the glass forming ability of a glass material, Hurby parameter (Kgl) was also calculated in this research.
Highlights
Tellurium oxide (TeO2) based glasses are promising material and exclusively suitable for electro-optic fibre, optical switching devices and laser hosts [1] [2]
The crystallization kinetics of the glass system we reexamined under non-isothermal conditions via differential scanning calorimetric (DSC)
The DSC measurement can be classified into two methods, heat flux DSC or power compensation DSC which give the information on the kinetic of first order phase transformation
Summary
Tellurium oxide (TeO2) based glasses are promising material and exclusively suitable for electro-optic fibre, optical switching devices and laser hosts [1] [2]. The calorimetry is a process of measuring the amount of heat released or absorbed with the surroundings and usually used for detecting chemical reactions, physical changes or phase transitions. Calorimeters are used in the field of material science, chemistry, physics and biology. Calorimeters are utilized in nanoscience field to measure thermodynamic properties of the biomolecules and nano-sized materials [5]. The differential scanning calorimetry (DSC) is one of the thermal analytical techniques that measure a sample material relative to a reference. The DSC measurement can be classified into two methods, heat flux DSC or power compensation DSC which give the information on the kinetic of first order phase transformation. The aims of this study are to study the thermal properties and the effect of heat treatment on silica borotellurite glass doped with manganese oxide
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