Studies based on structural and thermal properties have been carried out with wide ranging compositions in the glass system 70B2O3-(30-x) CdO-xK2O (where x=0, 5, 10, 15 and 20), in order to understand the effect of potassium ions on the structure of cadmium borate glasses. Various characterization techniques such as XRD, SEM, FTIR and DTA are used to study the modification encountered as a result of added dopant. XRD and SEM analysis confirmed the amorphous nature and homogeneity of the sample. The results of infrared spectra indicate that Cd2+ and K+ ions behave as network former and modifier respectively in the present glass system. Boron exists in both trigonal and tetrahedral units in these glasses and no boroxol ring formation takes place in the glass structure. The glass transition temperature (Tg), crystallization temperature (Tc) and melting temperature(Tm) are determined from DTA analysis and the values of glass stability and Hruby’s parameter are calculated to know the stability of the glasses.
