Abstract
A series of quaternary tellurite glasses in the form of 70TeO(2)-(25 - x)MnO2-xV(2)O(5)-Fe2O3 where (0 <= x <= 25 mol%) have been prepared by the conventional melt quenching technique. Differential thermal analysis (DTA) curves of these glasses have been investigated in the temperature range 300-1093 K and at different heating rates a = (2.5, 5, 10, 20 and 40 K min(-1)). The glass transition temperature (T (g)), the crystallization temperature (T (P)), the glass stability (a dagger T) and the activation energy for crystallization have been measured. The glass transition temperature has been analyzed according to the average cross-link density, and the average stretching force constant is present in the glass. FTIR investigations showed that the absorption bands of different modes of vibration in the manganese tellurite network were shifted toward higher wave number.