Diffractogram, differential thermal analysis (DTA), thermal gravimetrical analysis (TGA), and elemental compositions of nanolithium disilicate ceramics (Amber Mill) and zirconia-reinforced nanolithium silicate ceramics

Figures S1 and S2 show diffractograms of NLDS (Amber Mill) and ZNLS (Cerec Tessera) sintered at different temperatures. The diffractograms of the two ceramics before sintering (Figs. S1A, S2A) and after sintering at different temperatures exhibited no differences. High peaks were found for lithium disilicate (Li₂Si₂O₅), lithium phosphate (Li₃PO₄), lithium metasilicate (Li₂SiO₃), and quartz (SiO₂). Figure S3 shows thermal changes and thermal mass changes in NLDS (Amber Mill) and ZNLS (Cerec Tessera) specimens. When temperature was increased to 1,000°C, both ceramics had an exothermic reaction at temperatures of 500-650°C and an endothermic reaction at temperatures of 800-980°C. Analysis of thermal mass showed no change in either ceramics. Figure S4 shows the elemental composition obtained from EDX analysis in NLDS (Amber Mill) specimens sintered at different temperatures. Oxygen had the highest proportion (63.7 ± 0.6 wt%) before sintering. After sintering, the proportion of oxygen was still highest, but the proportion of silicon was higher in all groups and ranged from 23.1 ± 0.1 to 25.3 ± 0.1 wt%. NLDS2 had the highest proportion of silicon (25.3 ± 0.1 wt%). Figure S5 shows the elemental composition obtained from EDX analysis of ZNLS (Cerec Tessera) specimens sintered at different temperatures. Oxygen had the highest proportion (53.3 ± 0.2 wt%) before sintering. Elemental proportions did not change after sintering.