DTA and FTIR of 70TeO 2 –(25 − x )MnO 2 – x V 2 O 5 –5Fe 2 O 3 tellurite glass systems

摘要: A series of quaternary tellurite glasses in the form 70TeO2–(25 − x)MnO2–xV2O5–Fe2O3 where (0 ≤ x ≤ 25 mol%) have been prepared by conventional melt quenching technique. Differential thermal analysis (DTA) curves these investigated temperature range 300–1093 K and at different heating rates a = (2.5, 5, 10, 20 40 K min−1). The glass transition (T g), crystallization P), stability (∆T) activation energy for measured. has analyzed according to average cross-link density, stretching force constant is present glass. FTIR investigations showed that absorption bands modes vibration manganese network were shifted toward higher wave number.