If you are cooling down a glass and a polycrystalline ceramic system, how would the specific volume and configurational entropy change over time as you go through the T_gand T_m, label properly, explain using plots.
(a)What is the significance of sl and thus the critical radius of nucleus during glass formation? (b) What is the significance of the critical radius during nucleation?
Using a TTT diagram, explain how the cooling rate affects the phase transformation.
(a)Explain how the addition of metal oxide changes the viscosity of glass with different metal ions, having different oxidation numbers / valences. how they can either increase or decrease the viscosity, e.g., will the viscosity of a silicate glass change if you add a metal oxide like 〖Na〗_2 O or P_2 O_5. (b) In other words, Does the viscosity increase or decreases when the glass transition temperature is increased?