CVD Diamond Comparison

Compare CVD diamond with other hard materials

DDK makes CVD Diamond products cost-effective for applications from the most common to the most sophisticated. CVD Diamond has replaced less effective materials in existing industries and become the chosen material for challenging next generation applications.

CVD Diamond Property Comparison
Natural CVD PCD Tungsten Carbide Sapphire SiN Si GaAs Cu cBN Ag
Thermal Conductivity W/m-K 900-3200 1000-2000 400-650 70 25 25 150 44 400 1300 410
cal/mol-C 2.15 0.06 0.91 0.99
Electrical Resistivity ohm-cm >1016 1.7 x 10-6
Strength, Fracture

MPa

2800 1000 550-1150 2000 430 830 130
Hardness

GPa

80 70 49.8 17.9
Heat Capacity,

300K J/kg-K

515.74
Coeff. Thermal Exp. x

106K-1 at 300K

1.2 1.2 4.2 3.3 8 4.1 6.5 17 19
Refractive Index 2.42 2.38 1.77 3.4 3.75 2.12
Lattice Constant

cm

3.57 x 10-8
Sound Velocity

105cm/sec

18.21 15.85 6.7
Band Gap

eV

7.0 2.5 0.81
Dielectric Constant 5.7 5.7 11.7 10.9 7.1
Loss Tangent < 4 x 10-4
Dielectric Strength

105 V/cm

100 100 3 4