Research Article
Flexural Strength of Vitreous Ceramics Based on Lithium Disilicate and Lithium Silicate Reinforced with Zirconia for CAD/CAM
Table 2
Parameters used in the crystallization of the samples.
| | | G1 | G3 | G4 | G5 |
| | Predrying | 2 min | — | — | — | | Drying | 2 min | — | — | — | | Preheating | 2 min | — | — | — | | Starting temperature (°C) | 500 | 403 | 400 | 400 | | Temperature increase | 55°C/min | t1 90°C/min
t2 30°C/min | 55°C/min | 60°C/min | | Burning temperature | — | T1 820°C
T2 840°C | T 840°C | T 840°C | | Final temperature | 820°C | — | — | 700°C | | Vacuum | Off | Vacuum1: 550°C; e 1022°C
Vacuum2: 820°C; e 1508°C | Vacuum1: 410°C
Vacuum2: 840°C | On: 550°C
Off: 840°C | | Waiting time | 1.5 min | — | 4 min | — | | Closing time | — | 6 min | — | — | | Maintenance time | — | H1: 10 sec
H2: 7 min | 8 min | 10 min | | Cooling rate (°C/min) | 3 min | — | — | — |
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