Active Member
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[China]
Address: Yixing Industrial Park, Jiangsu Province
Contact name:Wu
Jiangsu BPT Precision Ceramics Co., LTD |
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96% Alumina Ceramic is commonly used for production of electric circuit ceramic substrates, it is most frequently used ceramic substrates becasue of its excellent advantages:
High mechanical strength and hardness
Good electrical insulation
Low dielectric constant and dielectric loss
Similar thermal expansion with Si
High thermal conductivity
Excellent corrosion resistance
Non-toxic
Available for surface metalization
Extra machining service: laser scribing/laser hole drilling/surface polishing/surface metalization could be made on alumina ceramic substrates.
Alumina ceramic performance table | |||||
Property | Item | Data | Unit | ||
| 99.8% | 99% | 95% | |||
Mechanical Characteristics | color | Ivory | light yellow | White | - |
| density | 3.93 | 3.85 | 3.7 | g/cm3 | |
| Bending Strength | 370 | 310 | 300 | MPa | |
| Compressive trength | 2,500 | 2,400 | 2,300 | MPa | |
| Elastic Modulus | 390 | 340 | 320 | GPa | |
| Fracture Toughness | 4 | 3~4 | 3~4 | MPa m^1/2 | |
| Weber Coefficient | 12 | 12 | 12 | m | |
| Vickers Hardness | 1,850 | 1,600 | 1,400 | HV 0.5 | |
Thermal Characterics | Coefficient of Line Thermal Expansion | 7~8 | 7~8 | 7~8 | 10^-6 K^-1 |
Thermal Conductivity | 32 | 29 | 20 | W/mK | |
Thermal Shock Resistance (Put in Water) | 280 | 200 | 250 | ΔT °C | |
Max Working Temperature | 1,700 | 1,600 | 1,500 | °C | |
Electrical Characteristics | Volume Resistance at 20°C | >10^14 | >10^14 | >10^14 | Ωcm |
Dielectric Strength | 15×10^6 | 15×10^6 | 15×10^6 | V/m | |
| Dielectric Constant | 10 | 10 | 10 | εr | |
One MHZ Dielectric Loss Angle at 20°C | 0.0001 | 0.0002 | 0.0004 | tanδ | |
Chemical Characteristics | Nitric Acid (60%) 90°C | 0.05 | 0.1 | 0.1 | WT Loss mg/cm^2/day |
| Sulphuric Acid (95%) 95°C | 0.22 | 0.34 | 0.3 | ||
Caustic Soda (30%) 80°C | 0.04 | 0.95 | 0.9 | ||
