Synthetic Diamond Properties

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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

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