Thermal-lens measurements of thermal diffusivity temperature dependence up to the glass transition in a fluoride glass

摘要

Abstract: The time-resolved mode-mismatched thermal lens technique has been used to determine the thermal diffusivity, D, temperature behavior of a fluoride glass (ZBLAN) from 25 to 315$DGR@C. We observed an abrupt decrease on D with minimum at 298$DGR@C which coincides with the glass transition temperature T$-g$/ value measured by DSC. These measurements indicate that the thermal conductivity, K, decrease by factor approximately 8.!2