FTIR and DSC study of Se_(92)Te_(8-x)Sn_x (x=0, 3 and 5) chalcogenide glasses

摘要

In the present work, DSC and FTIR study of the of Se_(92)Te_(8-x)Sn_x ( x=0, 2 and 4) glassy samples has been studied. FTIR spectra was taken in wavelength region 50-600 cm~(-1). The parameters like theoretical wave number and activation energy of glass transition and crystallization has been calculated by Kissinger'method and Augis and Bennett'approximation. With the addition of Sn, Far-IR spectra shift toward high frequency side and new bands starts appearing in the spectra. The Sn atom appear to substitute for the selenium atoms in the outrigger sites due to large bond formation probability. Activation energy of glass transition increases with Sn addition while for crystallization, it also increases except at x=1.