Aluminum Oxide Washers and Rings Overview
Aluminum oxide washers and rings are ceramic products with high hardness, high temperature and corrosion resistance, and excellent insulating properties. These products are mainly used in mechanical seals, chemical equipment, electronics, etc.: gaskets are used to seal joints to prevent leakage, while rings can be used for support, positioning, or as electrical insulation components. Their excellent chemical stability enables them to work stably for a long time in harsh environments, and they are indispensable basic components in modern industry.
Aluminum Oxide Gaskets and Rings
Properties of Aluminum Oxide Gaskets and Rings
Excellent mechanical properties
Hardness and wear resistance: Vickers hardness of 1800-2000 HV, in high load friction scenarios (e.g., bearing support rings), the wear rate is only 1/5 of that of metal parts, with a service life of 5-10 years.
Compressive strength: >350 MPa, tensile strength > 150 MPa, can withstand axial pressure and impact loads in mechanical assembly.
Extreme environmental adaptability
High-Temperature Resistance: It can work for a long time under the high-temperature environment of 1600°C, and the short-term temperature resistance reaches 1800°C. It is suitable for high-temperature scenarios such as ceramic kilns, aviation engines, and so on.
Chemical resistance: Except for hydrofluoric acid, the corrosion rate of strong acids (such as hydrochloric acid) and strong alkalis (such as potassium hydroxide) is < 0.005 mm/year, which is excellent in chemical reactors and pharmaceutical equipment.
Electrical and thermal properties
Insulation: dielectric strength > 10 kV/mm, volume resistivity > 10¹⁶ Ω・cm, can be used as an insulating barrier for high-voltage equipment to prevent arc breakdown.
Thermal stability: coefficient of thermal expansion 7.5×10-⁶/°C, thermal conductivity 20-30 W/m・K, dimensional change < 0.2% at sudden temperature changes (e.g. - 50°C to 1200°C).
Precision machining and surface characteristics
Dimensional accuracy: Gasket thickness tolerance ±0.1 mm, wall thickness uniformity ±0.1 mm for rings, suitable for precision assembly requirements (e.g., semiconductor device interfaces).
Surface finish: polished roughness < 0.5 µm Ra, reducing the risk of liquid retention and gas leakage, in line with food-grade hygiene standards.
Aluminum Oxide Gaskets and Rings Specification Table
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Applications of Aluminum Oxide Gaskets and Rings
Electronic and electrical applications
High-voltage equipment insulation: insulating washers for transformers and switchgear, isolating energized parts to prevent leakage, with a dielectric strength that meets the requirements of the 10 kV voltage class.
Semiconductor manufacturing: precision positioning rings in cleanroom equipment, surface particle contamination level < 100 /ft³, suitable for photolithography, etching process of ultra-high clean demand.
Mechanical and chemical industry
Mechanical sealing system: sealing gaskets for pump and valve interfaces, used with metal flanges, can withstand 10 MPa pressure and corrosive media (e.g., sulfuric acid solution) with a leakage rate of < 1×10-⁹ Pa・m³/s.
Chemical reaction vessel: as a reactor liner ring, resistant to strong corrosive media (such as aqua regia), and can withstand high-frequency vibration of the stirrer, the service life of 8 times more than metal parts.
Aerospace and Energy
Aero-engine seals: high-temperature gaskets between turbine components, maintaining airtightness in gas environments up to 1500°C, with a gradient material design (Al₂O₃-YAG composite layer) to reduce thermal stress.
New energy battery equipment: corrosion-resistant rings for lithium battery injectors, resistant to lithium hexafluorophosphate (LiPF₆) electrolyte corrosion, with a hydrophobic surface treatment to reduce liquid adhesion.
Medical and Food Industry
Medical implants: support rings for artificial joints, biocompatibility certified to ISO 10993, wear rate < 0.01 mm/year, excellent compatibility with human tissue.
Food grade pipe seals: gaskets in food processing equipment, compliant with FDA 21 CFR Part 177.2600, contact with acidic juices, alkaline detergents and other food media.
Company Profile
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, ceramic products, 3D printing powder, etc.
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.
If you are looking for high-quality Ceramic Products please feel free to contact us or click on the needed products to send an inquiry.
Applications of Ceramic Products
Process of Ceramic Products
Payment Term
T/T, Western Union, Paypal, Credit Card etc.
Shipment Term
By air, by sea, by express, as customers request.
Q1:What media can aluminum oxide washers and rings come into contact with?
Aluminum oxide washers and rings have good chemical corrosion resistance and can come into contact with most chemical media, including strong acids and strong bases. This makes them widely used in industries such as chemicals that need to come into contact with various chemicals, but when they come into contact with certain specific substances, they may need to be evaluated and selected based on the specific chemical properties.
Q2: How to choose the right aluminum oxide washers and rings?
There are several factors to consider when choosing the right aluminum oxide washers and rings. The characteristics and quality of the materials to ensure their performance; and the environmental conditions of the application, such as temperature, pressure, and chemicals, to ensure that they can work properly in a specific environment.
Q3: What should be paid attention to when installing aluminum oxide washers and rings?
When installing aluminum oxide washers and rings, you need to ensure that the installation surface is clean and flat to avoid affecting the sealing effect and service life. Use appropriate installation tools and methods to avoid damage to the product. At the same time, the manufacturer's installation guidelines and recommendations should be followed to ensure correct installation and use.
Q4: Can aluminum oxide washers and rings be reused?
It is generally not recommended to reuse aluminum oxide washers and rings. During use, they may be worn, deformed or otherwise damaged, affecting their sealing performance and service life. It is generally recommended to replace them after each use to ensure their reliability and safety.
Q5: How to maintain aluminum oxide washers and rings?
Methods for maintaining aluminum oxide washers and rings include regularly checking them for signs of wear, cracking or degradation so that problematic products can be discovered and replaced in a timely manner; when not in use, they should be stored in a cool and dry place, away from direct sunlight and contact with chemicals to extend their service.
