Controlled crystallization of BaO–B2O3–Bi2O3 Glass in the temperature range of a supercooled melt in the presence of additional nucleation centers

Abstract

To use the promising BaO–B2O3–Bi2O3 glass-forming system in the formation of glass-ceramic material, for example, with the yttrium aluminum garnet phase, a study of the crystallization behavior of bulk glasses and samples with additional nucleation centers acquired as a result of their crushing is carried out. In this work, the kinetics of crystallization combined with the subsequent melting of the formed phases with a change in the composition of the glass-forming system of 20Bi2O3 – (80-х)B2O3 – хBaO for x = 5, 10, 15, 20 mol% is investigated by means of differential scanning calorimetry. The crystalline phases, isolated at the established temperatures, are characterized by XRD method. A theoretically substantiated method for processing thermograms in the region of combined crystallization-melting peaks made it possible to establish the dependences of the crystallization parameters on the composition of crushed glass samples simulating nucleation centers, to find the compositions with highest stability against crystallization, and to recommend the time-temperature modes for the synthesis of glass-ceramics.