Viscosity and Glass Transition in Amorphous Oxides

Figure 13

Schematic representation of the dynamic homogeneous fractal structure of an amorphous material near the glass transition temperature. Below the 𝑇_𝑔, the correlation length gives characteristic sizes of clusters made of configurons, whereas above the 𝑇_𝑔, it shows characteristic sizes of clusters made of unbroken bonds. The higher the temperature is, the smaller sizes of fractal volumes are. Note that the structure shown is dynamical, for example, changes with time due to configuron diffusion.