Devitrification and vitrification of tellurite glasses

The crystallization of pure tellurite glass during various heating rates was studied. The activation energy for crystallization was 115 × 10²² eV mol^–1. The glass transformation, T_g, starting crystallization, T_x, crystallization, T_c and melting temperatures, T_m, have been reported for binary tellurite glasses of the form (1 – x) TeO₂–xA_nO_m [A_nO_m = MnO₂, Co₃O₄ and MoO₃]. Among many different parameters of the glass forming potential the two-thirds rule, T_g/T_m, the glass stabilization range, T= T_x – T_g, and the glass forming tendency, K_g= (T_c– T_g)/(T_m – T_c), are reported for the first time for tellurite glasses.