Alumina Ceramic Tube
Alumina ceramic tubes are made from high-purity aluminum oxide and offer excellent thermal, mechanical, and electrical insulation properties. They are commonly used in high-temperature environments, electrical insulation, analytical instruments, vacuum systems, and protective sheaths. Their resistance to corrosion and wear makes them ideal for demanding applications.
- High thermal resistance and insulation
- Excellent electrical insulation
- High hardness and wear resistance
- Corrosion resistance in harsh environments
- Custom production available
Alumina Ceramic Tube
Alumina ceramic tube is a staple in high-temperature and high-voltage applications. Made from 99%+ pure alumina, it offers excellent insulation, chemical stability, and wear resistance. Ideal for use in furnaces, thermocouple protection, or electrical feedthroughs, it performs reliably under thermal cycling and corrosive exposure. Its dense structure prevents gas leakage and supports long-term use in vacuum or reactive environments. With tight dimensional control and a smooth surface finish, the alumina ceramic tube is widely adopted in energy, metallurgy, and research sectors where thermal and electrical performance is essential.
Technical Specifications
| Parameter | Typical Range |
| Length Range | ≤300mm |
| Outer Diameter | ≤150mm |
| Surface Roughness | Ra0.02-Ra0.2 |
| Minimum Wall Thickness | 0.1mm |
| Roundness | 0.002mm |
| Concentricity | 0.002mm |
| Straightness | 0.004mm |
| Perpendicularity | 0.005mm |
Please refer to our Processing Capability Table for the full range of processing capability.
Advantages of Alumina Ceramic Tube
- High Thermal and Chemical Stability: Because alumina withstands extreme temperatures and harsh chemicals, the tube performs reliably in demanding environments.
- Excellent Electrical Insulation: As a result, it is ideal for use in high-voltage and electronic isolation applications.
- Superior Mechanical Strength and Hardness: Therefore, the tube resists wear, deformation, and mechanical stress under load.
- Corrosion and Oxidation Resistance: In addition, it maintains integrity when exposed to acids, alkalis, and oxidizing agents.
- Dimensional Stability and Precision Machining: Consequently, it supports tight tolerances and consistent internal and external diameters.
- Biocompatibility and Material Inertness: This makes it suitable for use in medical, laboratory, and food-contact environments.
Applications of Alumina Ceramic Tube
- Electrical Insulation Systems: For example, used in thermocouple sheaths, spark plug insulators, and feedthroughs.
- Furnace and Kiln Equipment: Because of its heat resistance, it serves in heating elements and high-temperature gas or fluid transfer.
- Medical and Laboratory Instruments: In addition, it is used in diagnostic tools, protective housings, and sterile fluid systems.
- Chemical Processing Equipment: Ideal for transporting corrosive fluids or gases in industrial and lab environments.
- Semiconductor Manufacturing: Provides insulation and protection in wafer processing and ultra-clean chemical delivery systems.
- Mechanical and Structural Applications: Lastly, used as spacers, guides, or structural supports in wear- and heat-intensive environments.
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