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Multi-bore Alumina Tubes

Multi-bore Alumina Tubes

Multi-bore alumina tubes are a type of ceramic tubing made from alumina, also known as aluminum oxide (Al2O3), that have multiple, parallel channels or bores running through their length. Alumina is a highly durable and heat-resistant material that is widely used in various industrial applications, such as electrical insulation, refractory lining, and high-temperature processing.

Multi-bore alumina tubes are typically produced through a process of shaping and sintering of alumina powder, resulting in a uniform and dense ceramic structure with parallel channels running through the length of the tube. The number, size, and spacing of the channels can vary depending on the intended use and application.

Multi-bore alumina tubes have excellent thermal and mechanical properties, including high strength, hardness, and thermal conductivity. They are also resistant to chemical corrosion, making them suitable for use in harsh and corrosive environments.

Multi-bore alumina tubes are commonly used in various industrial applications, such as in the manufacturing of thermocouples, sensors, and heating elements. They provide a reliable and efficient means of conducting heat and electrical signals while maintaining structural integrity under high temperatures.

Multi-bore alumina tubes can also be used in other industrial applications, such as in the filtration of gases and liquids, where the parallel channels provide a large surface area for efficient filtration.

Overall, multi-bore alumina tubes are a reliable and versatile material that offer excellent thermal and mechanical properties and longevity in a variety of industrial applications. They provide exceptional performance in harsh environments, while maintaining high efficiency and reliability over time.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality Multi-bore Alumina Tubes with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.



Multi-bore Alumina Tube Specifications 

Composition AL97 AL98
AL2O3 Content 97% 99.80%
Color White Ivory
Tensile 30 Kpsi 32 Kpsi
Flexural 55 Kpsi 60 Kpsi
Compressive 300 Kpsi 330 Kpsi
Density 3.7 g/cc 3.92 g/cc
Hardness 13.8 HV, Gpa 18 HV, Gpa
Thermal Conductivity 25 W/(m K) 32 W/(m K)
C.O.T.E. 77 In / In°C (x10^7) 78 In / In°C (x10^7)
Working Temperature 1500 °C 1750 °C
Dielectric Constant 9.5 9.8
Volume Resistivity >10^14 Ohm-cm >10^15 Ohm-cm
Dielectric Strength 16 KV/mm 20 KV/mm


*This chart just demonstrates the typical properties of common alumina materials we use to produce our multi-bore aluminum oxide tube. Please notice that the property for customized alumina parts could vary due to different process. CG Material could provide alumina ceramic products produced under your specified instruction, or do the best to meet customers’ requirements.

Multi-bore Alumina Tube Applications

Multi-bore alumina tube has a wide rage of applications:

• Air, gas and liquid filtration
• Used for making parts for CVD, ion implants, photolithography, and semiconductor parts.
• In traditional industries, alumina ceramics are ideal for products such as injector tubes, gas nozzles, and insulators.
• Alumina tubes are widely used as a protector for high-temperature thermal couples.
• Used as the protector for high-temperature thermal couples.
• Used as a material for the chemical industry due to its high corrosion resistance.



We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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