99.6% Alumina Specification Chart
Specifications are offered as assistance to Engineers and Purchasing professionals in the design and procurement of thin and thick film circuit substrates.
Centerline Technologies makes no certification as to the suitability of materials for any application.
|
Properties
|
Units
|
Polished High
Density 99.6%
Alum. Oxide
|
As-Fired High
Density 99.6%
Alum. Oxide
Hi-rel Grade
|
|
Chemical Composition
|
|
Al2O3
|
Al2O3
|
|
Purity
|
%
|
99.6
|
99.6
|
|
Color
|
|
White
|
White
|
|
Nominal Density
|
g/cm3
|
3.87
|
3.87
|
|
Surface Finish (Polished)
|
µ-inches
|
<1.0
|
N/A
|
|
Surface Finish (Lapped)
|
µ-inches
|
8-15*
|
N/A
|
|
Surface Finish (As-Fired)
|
µ-inches
|
N/A
|
2-3
|
|
Camber
|
inch/inch
|
.0003/.0005
|
.002
|
|
Thickness
|
inches
|
0.004-.040*
|
0.005-0.025*
|
|
Thickness Tolerance
|
inches
|
±0.0005
|
±0.001*
|
|
Process Sizes
|
Inches (L/W)
|
1.0/6.0
|
1.0/6.0
|
|
Coefficient of Thermal Expansion (CTE)
|
10-6
|
7.0-8.3 (25-1000°C)
|
7.0-8.3 (25-1000°C)
|
|
Thermal Conductivity
|
Watts/mK
|
26.9
|
26.9
|
|
Dielectric Constant
|
@1 MHz
|
9.9±0.1
|
9.9±0.1
|
|
Dielectric Constant
|
@4 MHz
|
9.9
|
9.9
|
|
Dielectric Constant
|
@10 MHz
|
9.7
|
9.7
|
|
Dissipation Factor (Loss Tangent)
|
@1 MHz
|
0.0001
|
0.0001
|
|
Dissipation Factor (Loss Tangent)
|
@10 MHz
|
0.0002
|
0.0002
|
|
Q
|
@1 GHz
|
5000
|
5000
|
|
Hardness
|
Rockwell
|
87
|
87
|
|
Flexural Strength
|
K(10-3) lbs/sq.in.
|
90
|
90
|
|
Compressive Strength
|
M(10-3) lbs/sq.in.
|
54
|
54
|
|
Grain Size
|
um (microns)
|
<1.0
|
<1.0
|
- * Additional thicknesses and tolerances available upon request.
- Basis for specifications available upon request.