CRYSTALLIZATION KINETICS OF SE-TE-CD GLASSES

Kinematical studies of crystallization in bulk amorphous Se70Te30-xCdx (x = 2, 6, 8, and 10) glasses mere made using differential scanning c alorimetry. The crystallization data are examined in terms of modified Kissinger and Matusita equations for the nonisothermal crystallizatio n, and the activation energy for crystallization E(c) is evaluated fro m the data obtained at different heating rates. The results show bulk nucleation with two-dimensional growth for these glasses. The enthalpy release during crystallization for all the compositions is measured. Maximum enthalpy release is obtained for the Se70Te28Cd2 glass having the highest thermal stability and the enthalpy release for Se70Te20Cd1 0, having the lowest thermal stability as indicated by the T-c-T-g val ues, is found to be minimum.