Isothermal and non-isothermal crystallization kinetics of zinc-aluminosilicate glasses

Crystallization behavior and microstructure of powdered and bulk ZnO–Al2O3–SiO2 glass-ceramics

“…7) matches well with the values for crystal growth of gahnite in similar glasses cited in literature [2,17], although no nucleation of the sample was undertaken. This can be attributed to the fact that the high-quartz structure acts as precursor for gahnite [7].…”

Non-isothermal crystallization kinetics of ZnO–BaO–B2O3–SiO2 glass

“…The activation energy of crystallization for the formation of first and second crystalline phases is 209 kJ/ mol and 189 kJ/mol, respectively. These values are considerably lower in comparison to the activation energies of the zinc aluminosilicate glasses as mentioned in the earlier studies [30]. This indicates that the three-dimensional connectivity decreases in the glass due to the presence of B 3+ ions and the diffusion of the ions in the glass became too easy to form a crystalline phase.…”

“…Although a number of studies have been reported aimed specifically at examining the relationship between phase separation, nucleation and crystallization in the derivatives of the ZnOAl 2 O 3 -SiO 2 glass system [13][14][15], literature survey reveals that there is no systematic experimental documentation on the crystallization kinetics of the glass system, ZnO-BaO-B 2 O 3 -SiO 2 . In view of the above mentioned perspective, the present work has been undertaken to study the thermal properties, the crystallization kinetics and the crystallization sequences of the glass ZnO-BaO-B 2 O 3 -SiO 2 .…”

Crystallization of amorphous Al2O3–SiO2 precursors doped with nickel

“…Fig. 1(b) shows these two exothermic events of the sample Ni2 resolved using the procedure given in our paper [17]. With the same procedure peaks p 1 and p 2 for the sample Ni1 could be resolved, as well.…”