Effect of Sm2O3 on structural and thermal properties of zinc fluoroborate glasses
(1. Department of Physics, Manipal Institute of Technology, Manipal University, Manipal-576104, Karnataka, India
2. Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal-576104, Karnataka, India;)
2. Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal-576104, Karnataka, India;)
Abstract: Glasses based on Sm3+ doped zinc fluoroborate were synthesized and characterized. Formations of glasses were investigated in the 30ZnF2-20TeO2-(50-x)B2O3-xSm2O3 matrix. Fast quenching and adequate heat treatment are required to prevent melt crystallization and to diminish thermal stress, which result in an efficient amorphous material. The differential scanning calorimetry (DSC), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray photoelectron spectroscopy (XPS) were employed to record, calculate, measure and analyze the stability, density and refractive index of the glass samples with different concentrations of Sm3+ ranging between 0 to 2.5% (mass fraction). XPS result shows the values of core-level binding energy (Zn 3s, Sm 4d, Te 3d, B 1s, O 1s and F 1s) of (ZnF2-TeO2-B2O3-Sm2O3) glass matrix and indicates the good fusibility of the present glass samples. Density of the glass samples increases as dopant concentration increases and glass transition temperature tg ranges between 395 °C and 420 °C.
Key words: samarium; ZnF2-TeO2-B2O3-Sm2O3 glass; rare earth; Hruby’s parameter; glass forming ability