Fig. 3

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Viscosité en fonction de la température en °C pour un verre de silice, SiO2, un tri et bi-silicate de sodium, NS3 et NS2, contenant respectivement 75 et 66 mol% de SiO2 et la différence à 100 étant du Na2O, les compositions NS1.5 et CS1.5 correspondent respectivement à 60SiO2–40Na2O et 60SiO2–40CaO (mol%). Les compositions NA75.6 et NA75.12 contiennent 75 mol% de SiO2 chacune et 6 ou 12 mol% d’Al2O3, la différence à 100 étant du Na2O (données de [8] pour les compositions NS3 et NAX. Y, de [9] pour CS1.5, NS1.5 et NS2 ; de [10] pour B2O3 ; de [11] pour NB82.10 = Pyrex).
Viscosity as a function of temperature in °C for a silica glass, SiO2, sodium silicate glass compositions, NS3 and NS2, containing respectively 75 and 66 mol% of SiO2 and the difference at 100 being Na2O, the compositions NS1.5 and CS1.5 correspond respectively to 60SiO2–40Na2O and 60SiO2–40CaO (mol%). The compositions NA75.6 and NA75.12 contain 75 mol% SiO2 each and 6 or 12 mol% Al2O3, the difference to 100 being Na2O (data of [8] for NS3 and NAX compositions. Y, from [9] for CS1.5, NS1.5 and NS2; [10] for B2O3; from [11] for NB82.10 = Pyrex).
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