As Fired Rectangular or Square High Purity Alumina Ceramic Substrate
Product Introduction
Alumina ceramic is a ceramic substrate material with good
comprehensive performance, accounting for 80% of the total ceramic
substrate materials, and is generally used in automotive electronics,
semiconductor lighting, electrical equipment and other fields.
Advantages of Alumina Ceramic Substrates
1. High Wear & Chemical Resistance.
2. Heat Resistant.
3. High Mechanical Strength.
4. Small Dielectric Loss.
5. Low Coefficient of Thermal Expansion (CTE).
6. High Light Reflection.
7. 0% Water Absorption
Applications
Manufacturing Capacity
1. Product Specification
Products of various specifications can be produced. The table below shows our standard thicknesses and sizes.
Alumina Ceramic Substrate |
99.6% Al2O3 |
Thickness (mm) |
Maximum Size (mm) |
Shape |
Molding Technique |
As Fired |
Lapped |
Polished |
Rectangular |
Square |
Round |
0.1-0.2 |
|
50.8 |
50.8 |
|
√ |
√ |
Tape Casting |
0.25 |
|
114.3 |
114.3 |
|
√ |
|
Tape Casting |
0.38 |
120 |
114.3 |
114.3 |
|
√ |
|
Tape Casting |
0.5 |
120 |
114.3 |
114.3 |
|
√ |
|
Tape Casting |
0.635 |
120 |
114.3 |
114.3 |
|
√ |
|
Tape Casting |
Other special thicknesses within the thickness range of 0.1-0.635mm can be achieved by lapping. |
96% Al2O3 |
Thickness (mm) |
Maximum Size (mm) |
Shape |
Molding Technique |
As Fired |
Lapped |
Polished |
Rectangular |
Square |
Round |
0.25 |
120 |
114.3 |
114.3 |
|
√ |
|
Tape Casting |
0.3 |
120 |
114.3 |
114.3 |
|
√ |
|
Tape Casting |
0.38 |
140×190 |
|
|
√ |
|
|
Tape Casting |
0.5 |
140×190 |
|
|
√ |
|
|
Tape Casting |
0.635 |
140×190 |
|
|
√ |
|
|
Tape Casting |
0.76 |
130×140 |
|
|
√ |
|
|
Tape Casting |
0.8 |
130×140 |
|
|
√ |
|
|
Tape Casting |
0.89 |
130×140 |
|
|
√ |
|
|
Tape Casting |
1 |
280×240 |
|
|
√ |
|
|
Tape Casting |
1.5 |
165×210 |
|
|
√ |
|
|
Tape Casting |
2 |
500×500 |
|
|
√ |
|
|
Tape Casting |
Other special thicknesses within the thickness range of 0.1-2.0mm can be achieved by lapping. |
2. Material Properties
Alumina Ceramic Substrate |
Item |
Unit |
96% Al2O3 |
99.6% Al2O3 |
Mechanical Properties |
Color |
/ |
/ |
White |
Ivory |
Density |
Drainage Method |
g/cm3 |
≥3.70 |
≥3.95 |
Light Reflectivity |
400nm/1mm |
% |
94 |
83 |
Flexural Strength |
Three Point Bending |
MPa |
>350 |
>500 |
Fracture Toughness |
Indentation Method |
MPa·m1/2 |
3.0 |
3.0 |
Vickers Hardness |
Load 4.9N |
GPa |
14 |
16 |
Young's Modulus |
Stretching Method |
GPa |
340 |
300 |
Water Absorption |
|
% |
0 |
0 |
Camber |
/ |
Length‰ |
T≤0.3: ≤5‰, Others: ≤3‰ |
≤3‰ |
Thermal Properties |
Max. Service Temperature (Non-loading) |
/ |
ºC |
1200 |
1400 |
CTE (Coefficient of Thermal Expansion) |
20-800ºC |
1×10-6/ºC |
7.8 |
7.9 |
Thermal Conductivity |
25ºC |
W/m·K |
>24 |
>29 |
Thermal Shock Resistance |
800ºC |
≥10 Times |
No Crack |
No Crack |
Specific Heat |
25ºC |
J/kg·k |
750 |
780 |
Electrical Properties |
Dielectric Constant |
25ºC, 1MHz |
/ |
9.4 |
9.8 |
Dielectric Loss Angle |
25ºC, 1MHz |
×10-4 |
≤3 |
≤2 |
Volume Resistivity |
25ºC |
Ω·cm |
≥1014 |
≥1014 |
Dielectric Strength |
DC |
KV/mm |
≥15 |
≥15 |
Our Main Customers