%0 Journal Article
%T First Order Phase Transformation in Amorphous Ge25Se75 ¨C xSbx Glasses
%A F.A.£¿Al-Agel
%A F.M.£¿Al-Marzouki
%A A.A.£¿Al-Ghamdi
%A Shamshad£¿A.£¿Khan
%J Journal of Nano- and Electronic Physics
%D 2013
%I Sumy State University
%X Non-isothermal Differential scanning calorimetry (DSC) technique was used to study the kinetics of first order phase transformation in Ge25Se75 ¨C xSbx glasses. The X-ray diffraction (XRD) technique was employed to investigate the amorphous and crystalline phases in Ge25Se75 ¨C xSbx glasses. From the heating rate dependences of crystallization temperature; the activation energy for crystallization and other kinetics parameters were derived. The temperature difference (Tc ¨C Tg) and Tc is highest for the samples with 6 % of Sb. Hence, Ge25Se69Sb6 glass is most stable. The enthalpy released is found to be less for Ge25Se69Sb6 glass which further confirms its maximum stability. The activation energy of crystallization ( Ec) is found to vary with compositions indicating a structural change due to the addition of Sb. The crystallization data are interpreted in terms of recent analyses developed for non-isothermal conditions. The present investigation indicates that both the glass transition and the crystallization processes occur in a single stage.
%K Glass transition temperature
%K Crystallization kinetics
%K X-Ray diffraction
%K Phase transformatio
%U http://jnep.sumdu.edu.ua/download/numbers/2013/2/articles/jnep_2013_V5_02021.pdf