Study of the crystallization behaviour in arsenic-sulphide glasses doped with Pb

Abstract

A kinetic analysis of the crystallization processes in arsenic-sulphide glasses doped with Pb was performed using the DSC method. According to the results of X-ray diffraction measurements of the annealed Pb3(As2S3)97 samples, it was found that the crystallization processes take part through the formation of As2S3, As-S and PbS centers. The dependence of crystallization activation energy on crystallized fraction determined using both Kissinger, Akahira and Sunose (KAS) and Vyazovkin methods, revealed that the first and second crystallization are a single-step processes, while the third one is a complex one. Using the methods of Šatava, Ozawa, and Ozawa-Chen, the occurrence of voluminous 3D crystal growth in investigated samples was found. Glass stability parameters indicated on increase in crystallization affinity with Pb content.