Crystalline phase formation, microstructure and mechanical properties of a lithium disilicate glass–ceramic

Microstructural evolution and physical behavior of a lithium disilicate glass–ceramic

“…Similar to past studies [26,41,44] Figure 20 for the possible reaction mechanisms when IPS e.max® CAD was heat-treated. This activity was in accordance with earlier findings [26].…”

“…Additionally, most of that handful of studies has been confined within the erudite realms of the pure or binary Li 2 O-SiO 2 systems [29,[38][39][40][41][42][43]. Exploration on how a "multi-component" CAD-CAM bloc crystallizes has been very limited [44]. Further investigation in describing the intricate interplay between thermal treatments and crystalline architecture exhibited by these materials can offer insights on how their atomic-scale behaviors can transcend to distress or to fortify their macroscopic material properties.…”

Lithium Disilicate Glass‐Ceramics by Heat Treatment of Lithium Metasilicate Glass‐Ceramics Obtained by Hot Pressing

“…The reported IPS Empress 2 Li 2 Si 2 O 5 material, with strength of 400 ± 40 MPa, has been prepared by the hot‐pressing technology . The flexural strength of ~440 MPa for Li 2 Si 2 O 5 glass‐ceramics prepared by hot‐pressing technology was also reported, which is favorable for the application as dental crown, but unfavorable for the machinability and costs of CAD/CAM or other processing. For the dental application of the Li 2 Si 2 O 5 glass‐ceramics by hot pressing, a new processing for preparing Li 2 Si 2 O 5 glass‐ceramics should be proposed by considering the machinability of metasilicate and the high strength of disilicate in the final product, which had been applied for the bulk Li 2 Si 2 O 5 glass materials in the dental crown fabrication .…”

Glass structure and crystallization of Al and B containing glasses belonging to the Li2O–SiO2system

“…Hence, it is hypothesised that this increase in entropy might change the free energy curve and reduce the thermodynamic driving force and ultimately the extent of LLPS, explaining the observed trend GB 0 > GB 100 > GB 50 . Further work is needed in this direction with more quantitative modelling of entropy on free energy involving 17 O NMR in order to evaluate the inuence of the various forms of bridging oxygens. Apart from thermodynamic driving force, the kinetics of LLPS is also dependent on glasses' viscosity, which decreased with increasing B substitution due to the creation of additional NBOs.…”