THE IMMISCIBILITY OF THE MELT IN Bi2O3-SiO2 SYSTEM
The effect of the onset temperature of cooling upon quenching a melt containing 50 mol.% Bi2O3 and 50 mol.% SiO2 on the phase composition, macro- and microstructure of the resulting solidification products was investigated. Using X-ray phase analysis, optical and scanning electron microscopy in the Bi2O3-SiO2 system, immiscibility of the melt was detected according to the results of local X-ray spectral analysis at a temperature of 1180 °C.