Synthetic Diamond Properties
| Available dimensions: diameter, mm thickness, mm |
1.0 - 60.0 0.2 - 1.8 |
| Hardness, GPa | 81 +/- 18 |
| Fracture toughness, MPa x m1/2 | 5.3 - 7.0 |
| Young's modulus, GPa | 1000 - 1100 |
| Poisson's ratio | 0.1 |
| Tensile strength (Weibull modulus), MPa: Nucleation surface Growth surface |
800 [11] 400 [23] |
| Rain impact DTV 2 mm drop size, m/s | 525 |
| Sand erosion @ 80 m/s C25/52 sand, mg/kg | 0.18 |
| Thermal conductivity @ 300 K, W/m x K | 1900 - 2200 |
| Thermal conductivity @ 500 K, W/m x K | 1100 |
| Thermal expansion coefficient, ppm/K | 1.0 @ 300 K 4.4 @ 1000 K |
| Thermal shock FOM, 103 W/m | ~1000 |
| Refractive index @ 10µm | 2.375 |
| dn/dT, K-1 | 9.6 x 10-6 |
| Dielectric constant D @ 35 GHz | 5.68 +/- 0.15 |
| % Increase in D @ 773 K | 4.3 |
| Loss tangent 145 GHz (10-6) | 8 - 50 |
| 8 - 12 µm absorption coefficient, cm-1 | < 0.07 |
| 3 - 5 µm absorption coefficient, cm-1 | min 0.8 @ 3.7 µm |
| Emissivity at 10 µm | 0.02 @ 573 K 0.03 @ 773 K |
| Integrated forward scatter 8 - 12 µm, % | 0.1 - 0.7 µm |
| Integrated forward scatter visible, % | < 4 |
| Density, 103 kg/m3 | 3.515 |
| Specific heat capacity 300 K, J x g-1 x K-1 | 0.52 |
| Transmission @ 8-200 µm (1 mm thick), % | > =7 |
| Transmission @ 633 µm (1 mm thick), % | > 48 |
