Thin Rectangular Al2O3 Sheet High Purity Alumina Ceramic Substrate
The alumina ceramic substrate has the following advantages:
1. Rich raw material sources.
2. Low cost.
3. High mechanical strength and hardness.
4. Good insulation and thermal shock performance.
5. Chemical corrosion resistance.
6. High dimensional accuracy.
7. Good adhesion to metals.
Alumina is a ceramic substrate material with good comprehensive performance. Alumina ceramic substrates are widely used in the electronics industry, accounting for more than 80% of the total ceramic substrates, and have become an indispensable material for the electronics industry.
Here is the typical application scenarios of alumina ceramic substrates.



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 |
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