Alumina Tube

Alumina Tube

Alumina Tube is made from high-purity aluminum oxide (Al2O3) with typical purities ranging from 90%-99.9%. It has exceptional high-temperature resistance, corrosion resistance, and mechanical strength. With a smooth surface, high hardness, and excellent electrical insulation properties, it performs reliably in demanding conditions. Advanced Ceramics Hub can supply customized solutions for diameter, wall thickness, length, and surface finish to meet diverse industrial and research requirements.

Alumina Tube Specifications

Multi-Bore Alumina Tube

Multi-bore alumina ceramic tubes are primarily used as thermocouple protection tubes to protect temperature-sensing elements from corrosion, oxidation, or damage by external substances during use. They are suitable for temperature measurement in air, steam, hydrogen, argon, carbon monoxide, and vacuum environments within the range of 600-1700°C. These tubes come in dual, four, and multi-hole configurations, with a minimum hole diameter of 0.5 mm and lengths up to 2600 mm. Customization is available based on specific customer requirements.

Alumina Tube Advantages

• Excellent electrical insulation properties
• High hardness and mechanical strength
• Wear and abrasion-resistant
• High thermal conductivity and thermal shock resistance
• Low density
• Resistant to strong acid and alkali attack at high temperatures
• Transparent to microwave radio frequencies
• High compressive and dielectric strength
• Very specific thermal conductive and thermal expansion rates

Alumina Tube Applications

• High-Temperature Furnace Linings and Thermocouple Protection: Used as linings in high-temperature furnaces (e.g., lab or industrial kilns) or as protective sleeves for thermocouples, withstanding up to 1700°C with strong thermal stability.
• Corrosion-Resistant Pipelines in Chemical Industry: Employed to transport corrosive gases or liquids, leveraging alumina’s exceptional resistance to acids and alkalis.
• Electronic Insulation Components: Serve as insulating tubes in electronic devices to protect wires or components, benefiting from high electrical insulation (dielectric strength up to 20 kV/mm).
• Wear-Resistant Mechanical Parts: Made into wear-resistant sleeves or pipes for high-abrasion environments, such as mining or powder transport systems, due to their high hardness (Mohs 9).
• Medical and Laboratory Equipment: Used in catheters or reaction tubes for precision instruments, owing to their biocompatibility and chemical inertness, ideal for biological experiments or dental applications.
• Vacuum and Plasma Systems: Applied as structural components in vacuum furnaces or plasma equipment, thanks to their low porosity and stability at high temperatures.

Alumina Material Properties