Thermal Stability and Structure of Tellurite Glass

Oxyfluoride tellurite glass with the composition of TeO2-AlF3-LaF3-ZnO/ZnCl2/ZnF2 was prepared successfully. The thermal stability and structure of TeO2-AlF3-LaF3 system tellurite glass were studied bySubscript text DSC and IR spectra. The results indicated that glass transition temperature of TeO2-AlF3-LaF3-ZnO/ZnCl2/ZnF2 glass was higher than that of (1-x)TeO2-xAlF3 (x=10%, 20%, 30%, 40%, 50%, in mol%) binary glass system slightly. A small number of ZnF2/ZnCl2/ZnO (5mol%) improved glass thermal stability. After adding 5mol% ZnF2/ZnO/ZnCl2 into fluoride tellurite glass respectively, glass transition temperature increased in turn. The introduction of 5mol% different zinc compounds had a little impact on the glass network structure.