| Surface Characteristics Available: |
As-Fired : |
< 30 µinches
< .004 inch/inch Camber
+/- 10% Thickness Tolerance |
Lapped : |
< 30 µinches
< .0005 inch/inch Camber
+/- 0.0005" Thickness Tolerance |
Polished : |
< 5 µinch maximum standard
4µinch max available
< .0005 inch/inch Camber
+/- 0.0005" Thickness Tolerance
|
| Mechanical Properties : |
Flexural Strength : |
35,000 psi average (ASTMF-417-75) |
Rockwell Hardness : |
65 (R45N) |
Knopp Hardness : |
1000 Kgm/mm2 |
Young's Modulus : |
50 x 106 psi (ASTMC-623-75) |
| Electrical Properties : |
Electrical Resistivity : |
> 1014 ohm cm |
Dielectric Strength : |
> 9.5 KV/mm |
|
Thermal Conductivity
(W/mk) |
260
Coefficient of Thermal Expansion (ppm/c) |
8.0
Density (gm/cm3) |
2.85
Dielectric Constant
(@1ghz) |
6.5
Loss Tangent (@1ghz) |
<0.0004 |
|
