Glasses formation, characterization, and crystal-structure determination in the Bi(2)O(3)–Sb(2)O(3)–TeO(2) system prepared in an air

A glass-forming domain is found and studied within Bi(2)O(3)–Sb(2)O(3)–TeO(2) system. The glasses composition were obtained in pseudo-binary xSbO(1.5), (1−x)TeO(2) for 0.05 ≤ x ≤ 0.20. The constitution of glasses in the system Sb(2)O(3)–TeO(2) was investigated by DSC, Raman, and Infrared spectroscopy. The influence of a gradual addition of the modifier oxides on the coordination geometry of tellurium atoms has been elucidated based Infrared and Raman studies and showed the transition of TeO(4), TeO(3+1), and TeO(3) units with increasing Sb(2)O(3) content. XRD results reveal the presence of three crystalline: γ-TeO(2), α-TeO(2), and SbTe(3)O(8) phases during the crystallization process. The density of glasses has been measured. The investigation in the ternary system by the solid state reaction using XRD reveals the existence of a solid solution Bi(1−x)Sb(1−x)Te(2x)O(4) isotopic to BiSbO(4) with 0 ≤ x ≤ 0.1.