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 |
|
|
|
|
