Glasses with composition 20Na2O-(80-x)B2O3-xLi2O and 20Na2O-(80-x) B2O3-xWO3 (where x = 0 to 10 in steps 2 mol%) were characterized by the amorphous nature of the samples were ascertained using X-ray diffractometry (XRD), thermo gravimetric analysis (TGA), differential thermal analysis (DTA), microhardness and Fourier transform infrared spectroscopy (FTIR). The amorphous phase of the prepared glass samples was confirmed from their TGA, and DTA profiles. DTA profile yielded data of transition temperature (Tg), crystallization temperature (Tp) and the thermal stability (ΔT) range of glasses. Microhardness studies exposed that the hardness of the sodium borate glass increases with an increase in applied load as well as with the doping of alkali and transition metal ions. Meyer’s index number/work hardening exponent ‘n’ was calculated and it was found that the material belongs to hard material category. FTIR spectra of the glasses were interpreted in terms of the structural transformations on the glass network by the changing composition. FTIR spectral study reveals the existence of BO3 and BO4 groups with Li-O-Li and W-O-W vibrations in the present glasses. The presence of varied types like di, tetra, penta, and ortho borate groups are confirmed in the glass matrix.
