EV Relay Alumina Ceramic Housing High Voltage DC Ceramic Contactor
EV Alumina Ceramic Relay Housing / High Voltage DC Ceramic Contactor
1. Description:
High voltage devices require insulators not only to contain the electric current, but also to not interfere with it. Such applications for which manufactures OEM ceramic parts include: high voltage spark arrestors and spark plug gap insulators.One device of note produces a 300kV electrical spark. A spark so strong, it finds any defect in the insulator, leading to the corona effect, or corona discharge, or worse, a conduction path other than the one intended for the current. Recalling the word “absence” mentioned earlier, such defects negate the intended purpose of the insulator. When encountered in a high voltage application.
2. Feature Advantages:
1) Low thermal conductivity
2) Chemical inertness
3) Good wear resistance
4) High Fracture toughness
5) Stiffness texture
6) Widely apply for automotive ceramic sensor , ceramic heater ,electric heating
3. Material Features / Properties:
| Color | White or Ivory | White or Ivory | White or Ivory | |
| Density | g/cm 3 | 3.82 | 3.9 | 3.92 |
| Hardness | HRA | 83 | 85 | 85 |
| Flexural Strength | Mpa (psi*10 3 ) | 375 | 386 | 381 |
4. Technical Parameters:
| Technical Parameters of Ceramics | ||||||||
| Items | Test Conditions | Unit or Symbol | 99% AL2O3 | 95% AL2O3 | 90% AL2O3 | Zirconia | Steatite | Silicon Carbide |
| Volume Density | -- | g/cm3 | ≥3.70 | ≥3.62 | ≥3.40 | ≥5.90 | ≥2.60 | ≥3.08 |
| Tightness | -- | Pa·m³/s | ≤1.0×10-11 | ≤1.0×10-11 | ≤1.0×10-11 | - | - | - |
| Liquid Permeability | -- | -- | Pass | Pass | Pass | Pass | - | |
| Flexural Strength | - | MPa | ≥300 | ≥280 | ≥230 | ≥1100 | ≥120 | ≥400 |
| Elastic Modulus | - | GPa | - | ≥280 | ≥250 | ≥220 | - | 400 |
| Poisson Ratio | - | - | - | 0.20～0.25 | 0.20～0.25 | - | - | - |
| Thermal Shock Resistance | 800℃( Room Temperature) Cycle: 10 times | Pass | Pass | Pass | - | - | - | |
| Coefficient of Linear Expansion | 20℃～100℃ | ×10-6 K-1 | - | - | - | ≤8 | - | |
| 20℃～500℃ | ×10-6 K-1 | 6.5～7.5 | 6.5～7.5 | 6.5～7.5 | 6.5～11.2 | - | - | |
| 20℃～800℃ | ×10-6 K-1 | 6.5～8.0 | 6.5～8.0 | 6.3～7.3 | - | 4 | ||
| 20℃～1200℃ | ×10-6 K-1 | - | 7.0～8.5 | - | - | - | - | |
| Coefficient of Thermal Conductivity | 20℃ | W/(m·k) | - | - | - | - | - | 90～110 |
| 1000℃ | ||||||||
| Dielectric Constant | 1MHz 20℃ | - | 9.0～10.5 | 9.0～10 | 9.0～10 | - | ≤7.5 | - |
| 1MHz 50℃ | - | - | 9.0～10 | - | - | - | - | |
| 10GHz 20℃ | - | 9.0～10.5 | 9.0～10 | 9.0～10 | - | - | - | |
| Volume Resistivity | 100℃ | Ω·cm | ≥1.0×1013 | ≥1.0×1013 | ≥1.0×1013 | - | ≥1.0×1012 | - |
| 300℃ | ≥1.0×1013 | ≥1.0×1010 | ≥1.0×1013 | - | - | - | ||
| 500℃ | ≥1.0×109 | ≥1.0×108 | -- | - | - | - | ||
| Disruptive Strength | D.C | kV/mm | ≥17 | ≥15 | ≥15 | - | ≥20 | - |
| Chemical Durability | 1:9HCl | mg/c㎡ | ≤0.7 | ≤7.0 | - | - | - | - |
| 10%NaOH | mg/c㎡ | ≤0.1 | ≤0.2 | - | -- | - | - | |
| Grain Size | - | μm | - | 3~12 | - | - | - | - |
5. Process Flows:
Formulating --- Granulating --- Forming --- Sintering --- Grinding --- Inspecting --- Packing
6. Application Fields:
New energy vehicles, charging piles, solar power generation, energy storage and power storage system, electric vehicle power system and so on.
7. Production Facilities: Prilling Tower , Forming Machine , High Temperature Sintering Kiln
8. Detection Devices:
Electric Performance Tester , Film Thickness Analyzer , Granulometer , Helium Mass Spectrometer Leak Detector , Universal Pull Force Meter
9. Order Flow Steps as belows: Inquiry ---Quotation --- Place an order --- Production --- Delivery
10. Our advantages: Quality Assurance ; Price Competitive ; Factory Supply Directly ; Good Service
11. Shipping and Package:
12. Our aimed market:
Notes:Above information only for reference and please contact with us for more details freely when you have any inquiry!
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