Property |
Value |
| Thermal properties |
Thermal conductivity
800-1800 w/mK, tailored to the application. Measured through-thickness at 20 degrees C.
Thermal expansion
1.0 ppm/K at 20°C
1.6 ppm/K at 100°C
2.3 ppm/K at 200°C
3.5 ppm/K at 400°C |
| Mechanical properties |
Fracture strength
800 MPa at 200 µm thickness
400 MPa at 800 µm thickness |
| Optical properties |
Optical absorption
< 0.04 cm-1 (10.6 µm)
Optical scattering
< 0.8 % (633 nm, BDTF 2°-80°) |
| Dielectric properties |
Loss tangent
tan d = 1-2×10-5 at 140 GHz |
|
Hardness* |
10,000 kg/mm2 |
Strength, tensile |
>1.2 GPa |
Sound velocity* |
17,500 m/s |
Density |
3.52 g/cm3 |
Atom density* |
1.77×1023 1/cm3 |
Young's modulus* |
1140 GPa |
Poisson's ratio |
0.069 |
Thermal expansion coefficient |
1.1 ppm/K |
Thermal conductivity* |
20.0 W/cmK |
Debye temperature* |
2,220 K |
Refractive index |
2.41 |
Optical transparency |
UV to far IR
|
Loss tangent at 140 GHz |
< 10-5 |
Dielectric constant |
5.7 |
Dielectric strength |
10,000,000 V/cm |
Electron mobility |
2,200 cm2/Vs |
Hole mobility |
1,600 cm2/Vs |
Bandgap |
5.45 eV |
Resistivity |
1013 - 1016 Wcm |
*highest value of all solid materials |
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