Crystallization of Se-Te glasses in ultrasonic field

The Se100-xTex (x = 0-10 at.%) glasses were crystallized in several ways: (1) by a long-term aging at room temperature, (2) by heating at about the glass transition temperature, and (3) by simultaneous heating and treatment in ultrasonic field. Measuring of optical transmission in the range of 400-1000 cm(-1) was used as a non-destructive method sensitive to initial stages of crystallization. By means of removing of the surface layer with the following re-measurement of transparency one can evaluate the nucleation heterogeneity; it is shown that the most homogeneous ceramics is formed in the low-Te region (1%Te and 2%Te) while pure Se and high-Te glasses (0%, 5%, 10% Te) tend to the surface nucleation. Ultrasonic treatment reveals new effects of optical anisotropy and enlightenment. The results are discussed from synergetic point of view using the notions about alternative hypervalence bonds and their self-organization in the form of bond wave.