Viscosity and structure of molten halide glasses based on chlorides, bromides and iodides

Abstract The viscosity of a series of molten halide glasses has been measured as a function of temperature in a nitrogen atmosphere by the rotating viscometer method. The viscosity and the activation energy for viscous flow of molten halides are much less than those for the glass-forming oxides, but they are much higher than those for other ionic salts such as KBr and TlI. The structures of molten halide glasses are discussed in terms of the experimental results.