Abstract
Glasses based on Sm3+ doped zinc fluoroborate have been synthesized and characterized. Formation of glass has been investigated in the 30 ZnF2-20 TeO2-(50-x) B2O3-x Sm2O3 matrix. Fast quenching is required to prevent melt crystallization and adequate heat treatment to diminish thermal stress, which results in an efficient amorphous material. The Differential Scanning Calorimeter (DSC), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX), stability, density and refractive index have been recorded, calculated, measured and analyzed for the glass samples with different concentrations of Sm3+ ranging between 0 to 3 mol%. Density increases as dopant concentration increases and glass transition temperature Tg ranges between 395 and 420°C. The increase of molar volume with Sm2O3 content indicates that the extension of glass network is due to the increase of the number of NBOs. The results found in this investigation showed that the refractive index of glass does not only depend on the density but also depends on the electronic polarizability of the glass. The increasing stability of the glass samples shows that they are thermally resistant. The presence of NBOs in the glass network is also approved by the decrease in glass transition temperature (Tg). The variation of the properties with different composition of dopant plays a dominant role in determining a good host material in the field of optics and photonics.
Highlights
Interest from the fundamental point of view: The replacement of fluorine by oxygen affects the glass
The measurement of density (ρ) and refractive index (n) are the effective tools to explore the degree of structural compactness modification of the geometrical configurations of the glass network (Eraiah, 2006)
The Molar Refraction, (Rm) of the glass samples were calculated using the formula given (Prajnashreeet al., 2013, Chimalawong et al, 2010, Sideket al.,2009) which is wellknown as Volf and Lorentz-Lorenz formula: Rm = {[(n2 −1) / (n2 + 2)] *Vm where, n is the refractive index of the glass sample. ρ is the density and M is the average molecular weight of the glass samples
Summary
Interest from the fundamental point of view: The replacement of fluorine by oxygen affects the glass. The fluoride glasses possess high high content of rare earth elements can appear to be elasticity and its best attribute is that these glasses have a low optical attenuation. These rare earth doped new functional materials (Polishchuk et al, 2011). The investigations of absorption properties of the Sm3+ ions have indicated that the optical properties of these rare earth ions can be affected by varying the glass composition, opening up the possibility of engineering applicationfriendly compositions (Lin et al, 2005). Oxide glasses are attracting hosts for obtaining efficient luminescence in rare earth ions
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