Glass samples of the system: xB₂O₃-(100-x) TeO₂; x= 15, 20, 25 and 30 mol% were prepared by melt quenching and characterized by X-ray diffraction, density measurements, Differential Scanning Calorimetry and FTIR spectroscopy. XRD confirmed the amorphous structure of all samples. Density of glasses decreased with increase in B₂O₃ concentration due to the replacement of heavier TeO₂ with lighter B₂O₃ whereas the glass transition temperature increased from 339°C to 366°C; the later effect was due to increase in the concentration of stronger B-O bonds in the glass network. FTIR studies found that BO₄ units convert into BO₃ with the addition of B₂O₃