Stellar Industries
Thermal Management Specialists
 
Beryllium Oxide Substrates ::
Thermal Conductivity: 280 W/mK
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
 
 
 
Stellar Industries Corp. 50 Howe Avenue Millbury, MA 01527 | 508.865.1668 | sales@stellarind.com