Alumina Plate/Sheet/Disc
- Custom and standard options available.
- Fast lead times guaranteed.
- High performance at a competitive price.
High-purity Alumina Plate/Sheet/Disc offers wear resistance, thermal stability to 1700°C, chemical inertness, electrical insulation, and non-magnetic properties. Ideal for substrates, thermal barriers, vacuum chambers, and protective covers in semiconductor, aerospace, medical, and chemical applications. Custom sizes available.NexusX Advanced Materials, as a premier manufacturer and supplier of high-quality. Alumina (Al2O3) products, focuses on producing high-precision aluminum nitride silicon structural compenents through advanced technologies for diverse application fields.
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Alumina Plate/Sheet/Disc Data Sheet
Purity: | 95%, 96%, 99%, 99.5%, 99.7%, 99.95% |
Color: | White or Ivory |
Density: | 3.7-3.98 g/cm3 |
Alumina Plate/Sheet/Disc Descriptions
Alumina plates, sheets, and discs are high-performance ceramic substrates manufactured from 95%–99.8% high-purity aluminum oxide (Al₂O₃). They exhibit exceptional surface hardness (HRA 80–90), outstanding wear resistance, and superior chemical inertness against most acids, alkalis, and organic solvents. Unlike metal plates, alumina versions provide excellent electrical insulation (dielectric strength >10 kV/mm), non-magnetic properties, and remarkable thermal stability from cryogenic temperatures up to 1700°C. These flat ceramic components are widely used as structural supports, thermal barriers, vacuum chamber liners, protective covers, and precision spacers. Typical industries include semiconductor processing (wafer handling, chucks), aerospace components, medical imaging equipment (MRI shields), chemical reactor linings, high-temperature furnace insulation, and laboratory instrumentation. Custom thicknesses, diameters, surface finishes (polished, lapped, or as-fired), and tight tolerances are available upon request.
Alumina Plate/Sheet/Disc Advantages
- High hardness & wear resistance – Exceptional surface hardness (HRA 80–90) for long-lasting performance under abrasion.
- Chemical inertness – Resists most acids, alkalis, and organic solvents.
- High-temperature stability – Operates reliably from cryogenic up to 1700°C.
- Electrical insulation – Dielectric strength >10 kV/mm, ideal for high-voltage applications.
- Non-magnetic – Safe for MRI, electron microscopes, and sensitive electronic equipment.
- Vacuum compatible – Non-outgassing, suitable for UHV chambers and semiconductor tools.
- Low thermal expansion – Maintains dimensional stability under thermal cycling.
- High compressive strength – Withstands heavy loads without cracking or deformation.
- No galvanic corrosion – Eliminates electrochemical reactions when contacting metals.
- Customizable – Available in various thicknesses, diameters, surface finishes, and tolerances.
Alumina Plate/Sheet/Disc Applications
- Semiconductor manufacturing – Wafer handling chucks, substrates, and chamber liners in etching, CVD, and PVD equipment.
- High-temperature furnaces – Thermal barriers, hearth plates, insulation supports, and shielding in kilns and vacuum furnaces.
- Chemical processing – Protective liners, reactor covers, and corrosion-resistant barriers in pumps and valves handling aggressive fluids.
- Vacuum systems (UHV) – Chamber liners, feedthrough flanges, and vacuum windows in particle accelerators and space simulation equipment.
- Medical devices – MRI shielding plates, non-magnetic instrument panels, and imaging equipment components.
- Electronics & electrical insulation – Substrates for thick/thin film circuits, high-voltage insulation plates, and heat sink isolation.
- Aerospace & defense – Lightweight, high-temperature structural panels and protective covers for sensors and avionics.
- Automotive & EV – Thermal management plates, battery cell spacers, and insulation discs in power electronics.
- Laboratory & analytical instruments – Sample stages, spectrometer windows, and plasma system shielding.
- Marine & offshore – Corrosion-resistant protective plates for bolted assemblies and equipment housings in saltwater environments.
Alumina Ceramic Machining
Alumina ceramics are produced through methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding techniques. Advanced Ceramic Hub utilizes cutting-edge green and biscuit machining technology to produce more complex components with traditional methods. Our advanced machining center includes drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the manufacture of alumina ceramic components with tight tolerances and high complexity. During the machining process, the following precautions should be observed:
- Shrinkage Control: Alumina ceramics shrink by about 20% during sintering, requiring dimensional adjustments in the green body stage.
- Tolerance Control: Precise tolerances are unachievable in the green or pre-sintered state; fine machining should follow sintering.
- Diamond Grinding: Post-sintering, high-hardness alumina requires diamond grinding, as conventional methods fall short.
- Tool Selection: Diamond-coated tools or grinding wheels are essential to handle ceramic hardness and prevent tool damage.
- Temperature Control: Strict temperature management during sintering prevents cracking or deformation.
- Stress Management: Excessive stress during machining must be avoided to prevent brittle failure.
- Cutting Speed and Feed Rate: Controlled speeds and feeds ensure quality and extend tool life.
- Surface Treatment: Post-machining polishing removes defects, enhancing performance and appearance.
Alumina Ceramic Packaging
The Alumina Ceramic products are carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.
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- SAFETY DATA SHEET (SDS) -Alumina Plate/Sheet/Disc
FAQ
What is an Alumina Plate/Sheet/Disc?
An Alumina Plate/Sheet/Disc is a flat ceramic component made from high-purity aluminum oxide, offering high-temperature resistance, corrosion resistance, electrical insulation, and non-magnetic properties for use as substrates, thermal barriers, and vacuum chamber parts.
What are the main advantages of an Alumina Plate/Sheet/Disc?
The main advantages of an Alumina Plate/Sheet/Disc include extreme hardness, wear resistance, chemical inertness, high-temperature stability (up to 1700°C), electrical insulation, non-magnetic properties, vacuum compatibility, low thermal expansion, and no galvanic corrosion.
Where is an Alumina Plate/Sheet/Disc commonly used?
An Alumina Plate/Sheet/Disc is commonly used in semiconductor manufacturing (wafer chucks, chamber liners), high-temperature furnaces (thermal barriers, hearth plates), chemical processing liners, vacuum systems, medical imaging devices (MRI), electronic insulation substrates, and aerospace structural components.
Can an Alumina Plate/Sheet/Disc replace a metal plate/sheet/disc?
Yes, an Alumina Plate/Sheet/Disc can replace a metal plate/sheet/disc in high-temperature, corrosive, insulating, or non-magnetic environments, but it is not recommended for high-impact or high-tensile-load applications.
Can an Alumina Plate/Sheet/Disc be used in a vacuum environment?
Yes, an Alumina Plate/Sheet/Disc can be used in vacuum environments. It is non-outgassing and highly stable, making it suitable for UHV applications such as semiconductor process chambers and space simulation equipment.
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