Extended glass‐forming region in the AgCl‐Ag 2 S‐As 2 S 3 ternary system

In the present work, glass formation property of the AgCl‐Ag 2 S‐As 2 S 3 ternary system is investigated. An extended glass‐forming region rich in the AgCl content (up to 80 mol.%) is observed. It is also found that there exists a small devitrification domain dividing the whole glass‐forming region into two parts. XRD analyses confirm that the precipitated crystals in the crystallized samples are pure AgCl, or Xanthoconite and Proustite Ag 3 AsS 3 , depending on the Ag 2 S/As 2 S 3 ratio and the AgCl content. Structural evolutions of the selected samples 15AgCl‐ yA g 2 S‐ zA s 2 S 3 are examined by high‐resolution XPS , and Raman spectroscopy. The crystallization mechanisms are studied comprehensively by SEM , DSC , and XRD measurements, and tentatively assigned to the presence of phase separation. The results reported in this article are expected to serve as a guide for the selection of suitable electrode materials for electrochemical applications.