BEGO Zirkon ST / BEGO Zirkon ST Multi
Super translucent zirconium dioxide for large restorations
| Chemical composition | |
|---|---|
| ZrO2 + HfO2 + Y2O3 | ≥ 99.5 % by weight |
| Yttrium oxide (Y2O3) | 6.9 % by weight |
| Aluminum oxide (Al2O3 ) | 0.05 % by weight |
| Sum of all other oxides | ≤ 1.5 by weight |
| Physical material data | |
|---|---|
| Density | 6.06 g/cm3 |
| Strength biaxial | > 1,000 MPa |
| Vickers hardness (HV 1) | 1,250 MPa |
| Translucency | 45 % |
| Coefficient of thermal expansion (RT – 600 °C) | 10.8 x 10-6 K-1 |
| Grain size | < 0.5 μm |
| Chemical solubility | |
|---|---|
| Acetic acid 4 % solution in water quality 3 as per ISO 6872 | ≤50 μg/cm2 |
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