Crystallization in a soda-lime-silicate glass after high pressure

This work explored the permanent changes a high pressure (HP) processing could cause on nucleation, Raman vibrational modes, thermal, and mechanical properties of the Na2O center dot 2CaO center dot 3SiO(2) (N1C2S3) glass. It was shown that, with higher pressure values, the number of nuclei per unit of volume, N-V, has decreased. Raman spectra showed no significant changes in the vibrational modes; however, the differential thermal analysis performed indicated that the glass transition temperatures, T-g, were higher than the pristine glass sample and that HP caused the glass to be less stable. The Vickers indentation radial cracks remained constant; however, the lateral cracks increased in size, indicating that the glass is more stressed after HP, and therefore, the relaxation time for nucleation will be higher, lowering N-V further, as observed.