Custom Machined Alumina Ceramic Parts Precision Machined Aluminum Oxide Ceramic Plate Electrical Insulation
Custom Holes Al2O3 Alumina Ceramic Thermal Insulation Plate Precision Machined Ceramic Insulating Disc
Alumina ceramic part is produced by firing a tightly packed powder form of Al2O3 which includes some binder material. Commercially available grades range from 90% up to 99.95% with the higher purity generating somewhat higher hardness. Alumina Ceramics are the most highly regarded and widely used of the ceramic products. It is non-conductive, resistant to corrosion, and are perfect for electrical insulation. Alumina Ceramic has proven to be the best ceramic for protection of vital electrical components. It can be processed as tubing, sheets, bars, rods, discs, and many other forms depending on the requirements of the project.
Alumina Ceramic Insulating Disc
This custom alumina ceramic heat insulation plate is sintered at high temperature and processed by precision CNC machining. It can maintain stable physical and insulating properties under continuous high-temperature working environments.
The alumina plate serves dual functions: heat barrier to block heat transfer and electrical isolation to prevent short circuit. We can fabricate irregular shapes, multiple mounting holes, large central bore and special slotted cutouts as required by customers. Strict flatness and dimensional tolerance are guaranteed.
Typical applications include industrial furnaces, vacuum systems, plasma processing equipment, high-temperature test fixtures and power insulating assemblies. Custom samples are available for performance verification before mass production.
Alumina Oxide (Al2O3) Properties:
◆ High Hardness
Strong wear resistance, durable and not easy to wear.
◆ Excellent Thermal Conductivity
The thermal conductivity at room temperature is 30~40W/(m·K), which is higher than that of steel, copper and aluminum.
◆ Good Chemical Stability
Resistant to acid, alkali and salt corrosion.
◆ High Temperature Stability
Withstands 1600℃ high temperature and has high temperature stability.
Key Properties
- High working temperature up to 1600℃
- Excellent electrical insulation performance
- High bending strength & hardness
- Good resistance to acid‑base corrosion
- Custom dimensions and tolerances supported
Applications
Thermocouple protection tubes, furnace insulation components, heating element sleeves, electronic insulating parts, industrial high‑temperature equipment.
| Chemical Formula | Al2O3 | |
| Mechanical | Density | 3.7 gm/cc |
| Hardness |
2000 Knoop |
|
| Tensile Strength | 28 kpsi | |
| Modulus Of Elasticity | 41 - 46 x 106 psi | |
| Flexural Strength | 51 kpsi | |
| Compressive Strength | 300 - 350 kpsi | |
| Poissons Ratio | 0.21 | |
| Fracture Toughness | 4 - 5 MPa m½ | |
| Electrical | Dielectric Strength | 212 - 220 ac V/mil |
| Dielectric Constant | 9.3 (@ 1 MHz) | |
| Volume Resistivity | > 1014 ohm-cm | |
| Thermal | Coefficient Of Thermal Expansion | 5.2 - 7.9 x 10⁻⁶/°C |
| Thermal Conductivity | 18.0 - 28.0 W/mK | |
| Specific Heat | 0.21 cal/g °C | |
| Shock Resistance | 300 °C Diff. | |
Alumina Ceramics Typical Applications Include:
Wear resistant components,
High pressure nozzles,
Thermocouple tubes,
Electrical Insulators,
Corrosive labware,
Furnace fixtures,
Ballistic armor,
Thread guides,
Laser Tubes,
Pump seals.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.