1. Description
Our products with high mechanical strength, hardness, wear resistance, high temperature, chemical resistance and good characteristics. We manufactures custom technical ceramics, covering a wide range of customer requirements.Each product has passed the full(100%) inspection before export, you can safely buy it.
Our service:
l Technical personnel: We are equipped with professional technical personnel
l Stock:Large quantity in stock ensured fast delivery.
l Inquiry response: Your inquiries will be replied in 24 hours.
l Delivery time: Your shipment will be loaded in 15~25days.depends on quantity.
l Payment term: T/T, L/C, D/P, D/A, Western Union (Sample only)
l Customized:We can supply the products according to customer's drawings, samples and performance requirement.
2. Main Features
Typical Alumina characteristics include:
Good strength and stiffness
Good hardness and wear resistance
Good corrosion resistance
Good thermal stability
Excellent dielectric properties (from DC to GHz frequencies)
Low dielectric constant
Low loss tangent
3. Specification
| Item | Test Condition | Unit Symbol | 95% Alumina ceramics | 99% Alumina ceramics | 99.7% Alumina ceramics |
| The main chemical ingredient | | | Al2O3 | Al2O3 | Al2O3 |
| Bulk Density | | g/cm3 | 3.6 | 3.89 | 3.96 |
| Maximum Use Temperature | | | 1450°C | 1600°C | 1650°C |
| Water absorption | | % | 0 | 0 | 0 |
| ROHS Hardness | | | ≥85 | ≥89 | ≥89 |
| Flexural strength | 20° C | MPa (psi x 103) | 358 (52) | 550 | 550 |
| Compressive Strength | 20° C | MPa (psi x 103) | 2068 (300) | 2600(377) | 2600(377) |
| Fracture Toughness | K(I c) | Mpa m1/2 | 4-5 | 5.6 | 6 |
| Coefficient of thermal expansion | 25-1000° C | 1X 10-6/°C | 7.6 | 7.9 | 8.2 |
| Coefficient of thermal conductivity | 20° C | W/m °K | 16 | 30.0 | 30.4 |
| Thermal Shock Resistance | Tc | °C | 250 | 200 | 200 |
| Dielectricity constant | 1MHz.25°C | | 9 | 9.7 | 9.7 |
| Dielectric strength | | ac-kV/mm (ac V/mil) | 8.3 (210) | 8.7 (220) | 8.7 (220) |
| Volume Resistivity | 100°C | ohm-cm | > 1013 | > 1014 | > 1014 |
