Kinetics of crystal nucleation of Na2O•2CaO•3SiO2-based solid solutions in glasses of the Na2SiO3-CaSiO3 pseudobinary join

The kinetics of crystal nucleation is investigated in sodium calcium silicate glasses of two compositions (22.4 and 24.4 mol % Na2O), which belong to the Na2SiO3-CaSiO3 pseudobinary Join and, according to the phase diagram, lie in the region of the formation of solid solutions between the compositions Na2O.2CaO. . 3SiO(2) and Na2O . CaO . 2SiO(2). The stationary rate of crystal nucleation of Na2O . 2CaO . 3SiO(2)-based solid solutions is measured as a function of temperature. It is shown that the maximum stationary rate of nucleation increases with an increase in the sodium oxide content in the initial glasses. The experimental data are analyzed in the framework of the classical nucleation theory.