The temperature (T) dependence of the Newtonian viscosity (hO) of a liquid may be described by a Tg-scaled Arrhenius plot, a so-called "fragility diagram". Angell first introduced the concept of fragile-strong melt behaviour. A strong melt exhibits gentler temperature dependence of viscosity, whereas a fragile melt as a stronger temperature dependence. Obviously, the concept of the fragility deals with the response of viscosity to temperature, but not to the shear rate. At sufficiently high shear rate, the shear thinning flow occurs in oxide glass melts, whose extent depends on the structure. Now the question is whether there exists a direct correlation between the shear thinning behaviour, the fragility and the spinnability of glass melts.
