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Nanoindentation and Brillouin light scattering studies of elastic moduli of sodium silicate glasses

“…In addition, though Q 3 species is produced right after the introduction of Na + ions, Q 2 species seems to become only gradually popular after the Na 2 O content reaching above 20 mol%, and the huge increase in the intensity of the 950 cm − 1 peak between glass samples of 30 mol% and 40 mol% Na 2 O content indicates a rapid production of Q 2 species in this composition range. The evolution of Q n species as a function of Na 2 O concentration in sodium silicate glasses observed in our Raman spectra is consistent with the results from previous theoretical calculations [18,19] and NMR [20,21] and Raman [17,22] experiments. Based on the cross-section analysis in Fig.…”

Group connectivity in binary silicate glasses: A quasi-chemical approach and molecular dynamics simulation

“…The simple stoichiometric model predicting presence of only Q 4 and Q 3 units in the glass structure is much closer to experimental results of 29 Si MAS-NMR [4][5][6]. However, this model does not contain Q 2 units which are inherently present in the MD simulated glass.…”

Connectivity of Q-species in binary sodium-silicate glasses

“…Raman [4] and 29 Si MAS NMR [5][6][7][8][9] spectroscopy. In addition, theoretical approaches, like molecular dynamics (MD) method or thermodynamic modelling [10][11][12] offer alternative approaches giving glass structure expressed in terms of Q-units.…”