| Basic materials characteristics |
|
| Coefficient of Thermal Expansion (CTE) |
0.52 ppm/K @ 5-35°C/0.57 ppm/K @ 0-200°C/0.48 ppm/K @ -100 - 200°C |
| Young's Modulus: |
72.1 GPa |
| Shear Modulus: |
30.6 GPa |
| Modulus of Rupture, abraded: |
52.4 MPa |
| Bulk Modulus: |
37.4 GPa |
| Poisson's Ratio: |
0.179 |
| Density (at 25°C / 77°F): |
2.201 g/cm3 |
| Knoop Hardness (100g load): |
522 kg/mm2 |
| Compressive Strength: |
1.14 GPa |
| Tensile Strength: |
54 MPa |
| Strain Point: |
893°C/1639.4°F |
| Annealing Point: |
1042°C/1907.6°F |
| Softening Point: |
1585°C/2885°F |
| Specific Heat: |
0.770 J/g K |
| Thermal Conductivity: |
1.38 W/mK |
| Thermal Diffusivity: |
0.0075 cm2/s |
| Refractive Index: |
Nd = 1,45840 (589nm) |
| Dielectric Constant: |
E= 3.8 |
