Crystallization properties of magnesium aluminosilicate glass-ceramics with and without rare-earth oxides

The crystallization kinetics of the MgO–Al2O3–SiO2–TiO2 glass ceramics system produced from industrial waste

“…Wang et al [14] have reported that the viscosity and melting temperature (T g ) is 780°C in MgO-Al 2 O 3 -SiO 2 glass ceramics system. Also, Goel et al [15] found that T g is 795°C in MgO-Al 2 O 3 -SiO 2 -TiO 2 glass ceramics system.…”

“…The two most important kinetics parameters, the activation energy (E a ) of the crystallization and Avrami parameter (n), were obtained from the relationship between heating rate (b) and temperature of crystallization (T p ) in the exothermic peaks DSC or DTA curve using Kissinger [14] Eq. (1),…”

“…5a, b. And from the value of the crystallization activation energy (E a ), the Avrami parameter (n) was calculated by Augis-Bennett [14,21,22] …”

“…Also, Song et al [18] calculated the activation energy of the glass system K 2 O-MgO-Al 2 O 3 -SiO 2 between 348 and 370 kJ mol -1 for the formation of cordierite. Some researchers [14,18] also reported that the alkali oxides such as K 2 O, CeO 2 and La 2 O 3 decrease the formation temperature of cordierite because the alkali oxides act as a glass network modifier and SiO 2 increases the formation temperature of cordierite The crystallization kinetics of the MgO-Al 2 O 3 -SiO 2 -TiO 2 glass ceramics system produced from… because it acts as a glass network former. Using activation energy value, the Avrami constant (n) corresponding to the crystallization mechanism was determined.…”

EFFECTS OF Nd2O3 ON THE CRYSTALLIZATION AND PROPERTIES OF GLASS CERAMIC IN Li2O–K2O–Al2O3–SiO2–P2O5 SYSTEM

“…In fact, there have been some crystallization studies on LS 2 GC that contain a certain amount of rare earth oxides in the compositions [11][12][13]. Nevertheless, the influences of those oxides' content were not found in these papers.…”