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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