99% Alumina Ceramic Ring Spacer High Compressive Strength Al2O3 Sealing Washer Gasket Insulating

High Precision Insulating Alumina Al2O3 Ceramic Sealing Washer Rings Gaskets

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. It is possible to machine alumina using diamond grinding techniques. Polishing is also possible, with the degree attainable affected by alumina grain size and production technique, like pressed or extruded.

Alumina ceramic shaped parts are industrial ceramic components made primarily from aluminum oxide (Al₂O₃) and formed into custom, complex, or irregular geometries. Unlike standard ceramic plates or rods, these parts are engineered to match specific applications, tolerances, and performance requirements.

Made of high‑purity Al₂O₃ ceramic, alumina rings and washers feature excellent electrical insulation, high temperature resistance, great hardness and outstanding chemical corrosion resistance. Ivory‑white finished surface with precise dimensional tolerance.
Available in various inner‑outer diameter and thickness specifications. Custom machining including grooving, step‑surface processing is supported. Widely used for insulation, spacing, sealing and wear‑resistant protection in electronics, high‑temperature furnaces and mechanical equipment.

Alumina Oxide (Al2O3) Properties:

High strength over a large temperature range
High fracture toughness
Good flexural strength
High hardness and wear resistance  
Low thermal expansion
Electrical insulator
Good oxidation resistance
Good chemical corrosion resistance
Wear resistant High stiffness

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.