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Alumina ceramics is a ceramic material with Al2O3 as the main crystal phase. SENCERAMICS can produce ceramic products with an alumina content of 95% to 99.8%. The alumina has a compact structure, low activity, and high-temperature stability. The electrical properties are the best, with good mechanical properties, with a Mohs hardness of 9.
| Material | Alumina 99.5%, Alumina 99.8% |
|---|---|
| Outer Diamerter | Up to 800mm |
| Wall Thickness | Down to 1mm |
| Tolerances | Up to +/-0.001mm |
| Forming | Isostatic-pressing |
| Processing | CNC machining with fine grinding |
| Customization | Send us your drawing to get our best offers |
Alumina ceramic ring is made of a ceramic material with Al2O3 as the main crystal phase. SENCER PRECISION CERAMICS can produce ceramic rings with an alumina content of 99% to 99.8%. The alumina has a compact structure, low activity, and high-temperature stability. The electrical properties are the best, with good mechanical properties, with a Mohs hardness of 9. High purity alumina ceramic ring has excellent vacuum sealing and heat dissipation which decide that this kind of ceramic component can be used for the Auto and Vessel industry.
| Composite | (wt %) | 99.5% | 99.8% |
| Color | White or Ivory | White or Ivory | |
| Density | g/cm3 | 3.9 | 3.92 |
| Hardness | HRA | 85 | 85 |
| Flexural Strength | Mpa(psi*103 ) | 386 | 381 |
| Gas Permeability | 0 | 0 | |
| Water Absorption | % | 0 | 0 |
| Thermal Shock Resistance | °C | 198 | 198 |
| Thermal Expansion | ×10-6/℃ | 8.2 | 8.2 |
| Dielectric Constant,20°C | 1MHz | 9.6 | 9.7 |
| Dielectric loss, tanδ | 1MHz | 1×1014 | 1×1014 |
| Volume Resistivity,20℃ | Ω·cm | ≥1014 | ≥1014 |
| Dielectric Strength,DC | Ω·cm | 20 | 20 |
| Compressive Strength | KV/mm | 2700 | 2600 |
| Fracture Toughness | MPa( psi * 103) | 350 | 350 |
| Poisson’s Ratio | MPa | 0.22 | 0.22 |
| Thermal conductivity | W/mK | 27 | 27 |
Alumina Ceramic Rings
Material:
Available Color:
White or Ivory
Feature:
High-Temperature Resistance, High Wear-resistance, High corrosion-resistance.
Size:
Size Customized, according to customer’s drawing, OEM. We can reach the best wall thickness of 0.5mm and the Max diameter of 800mm.
Application:
CNC fine machining and lapping ceramic parts, Industrial ceramic, Technical ceramic.
Advantage:
Package:
Carton+Palletize,Carton,bubble paper inside,Wooden Box.Pls let us know if you have any special requirements.
Producing Methods:
CNC Fine machining with Lapping, Dry-pressing, Isostatic-pressing
Tolerance:
Up to ±0.002mm, as customer’s drawing or OEM.
Surface:
Ultrasonic cleaning, according to customer’s requirements.
The time limit is very fast (usually will arrive in 5-7 days )and you do not need to pick up the goods by yourself.
Freight charge: higher.
The time limit is very fast (usually will arrive in 7-12 days) and you need to pick up the goods from the airport by yourself.
Freight charge: cheaper than air express.
The time limit is slow and you need to pick up the goods from the destination port by yourself.
Freight charge: cheapest.
We will contact you within 1 working day, please pay attention to the email with the suffix “@senceramics.com”.
