High temperature microscopy was used to study the temperature the dependence of the growth rate of the crystals of monocalcium silicate in melts with additions of metal oxides of variable valence Mn304, Fe2O3, FeO, CuO, Cu2O. The obtained dependencies could be approximated by means of the proposed semi-empirical equation that takes into account the temperature dependence of the mechanism of the process of embedding structural elements in the crystal.
Data on linear growth rates and induction periods of crystal nucleation as a function of temperature and composition in a pseudo-binary system of gelenite-dicalcium silicate are presented. A metastable growth region of dicalcium silicate crystals in a gehlenite field with a melting point lower than the melting point of the eutectic (supercooling phenomenon) is observed.
the effect of small additions of alkali and alkaline-earth metal oxideson the crystal growth rate from the melt can be manifested not only by lowering
the liquidus temperature and decreasing the driving force of crystallization, but also by modifying the structure of the melt and the crystal.
The temperature dependencies of crystal growth rates were studied: in melts of two triple eutectic of the CaO-Al2O3-Si02 system, with small additions of iron, copper, and lithium oxides, and the effect of these additives on the strength properties of glass-crystalline materials obtained from the melt of these eutectic by powder sintering glass.