Custom Sapphire Tube Manufacturing
We provide custom sapphire tubes (single-crystal Al₂O₃) for applications requiring high-temperature stability, chemical resistance, electrical insulation, and optical/IR transparency (application-dependent). Sapphire tubes are widely used in high-temperature furnaces, vacuum/pressure assemblies, plasma systems, optical windows/sleeves, and harsh-environment instruments.
We support prototype to small/medium production with flexible specifications for OD/ID, length, wall thickness, end-face options, and surface finish.
Why Sapphire Tubes
- High melting point and thermal stability for high-temperature environments
- High hardness and wear resistance for long-life components
- Excellent electrical insulation at elevated temperature (design dependent)
- Good optical transmission from UV to IR ranges (depends on grade/orientation/finish)
- Chemical resistance for many corrosive environments (verify for your chemistry)
Common Applications
- High-temperature furnace tubes / sample sleeves / thermocouple protection
- Vacuum chambers, feedthrough sleeves, dielectric spacers
- Plasma processing, sputtering/CVD hardware
- Optical sleeves, high-pressure viewing tubes (design dependent)
- Sensor housings for harsh environments
FAQ — Custom Sapphire Tubes
What is a sapphire tube used for?
Sapphire tubes (single-crystal Al₂O₃) are used for high-temperature furnace sleeves, vacuum/plasma hardware, electrical insulation parts, and optical/harsh-environment components.
Can you polish the OD or ID?
Yes, polishing can be offered on the OD, end faces, and in some cases the ID (depending on tube geometry). Specify where you need polishing and your target surface requirement.
Is sapphire good for high temperature?
Yes. Sapphire has excellent thermal stability and is commonly used in high-temperature environments. Final suitability depends on your thermal gradients, mounting method, and atmosphere.
What tolerances are achievable?
Achievable tolerances depend on OD/ID, wall thickness, and length. Share your target tolerances and we will recommend practical values based on your tube geometry.
Do you support custom end shapes?
Yes. End faces can be flat, chamfered, radiused, or custom-machined. Please provide a drawing or sketches with critical dimensions.
What information do you need for a quote?
OD, ID (or wall thickness), length, quantity, end-face requirement, surface finish (ground/polished), tolerance targets, and operating conditions (temperature, vacuum/pressure, atmosphere).
