Custom alumina ceramic tubes (Al₂O₃) for furnace and work-tube, thermocouple protection, electrical insulation and multi-bore sensor channels. ADCERAX is a China-based advanced technical ceramics manufacturer supplying custom alumina tubes to furnace and thermocouple builders, thermal-equipment OEMs, instrument and sensor makers, labs and maintenance buyers worldwide.
Tell us the tube type, dimensions and working conditions — or send a drawing or sample — and our engineers review feasibility and quote from there.
1730°C
99.7% Max Operating Temp
Alumina ceramic tubes are precision tubes made from high-purity aluminium oxide (Al₂O₃), used where parts must handle high temperature, electrical insulation, wear and chemical exposure. They are supplied as open-end, closed-end, single-bore and multi-bore forms for furnace work tubes, thermocouple protection, sensor and heater insulation, and drawing-based custom parts.
The right tube depends on your application, dimensions and working conditions, so the sections below help you choose a type and prepare an accurate RFQ.
We provide a comprehensive selection of alumina ceramic pipe types to suit a wide range of industrial, laboratory, and high-temperature applications. Whether you need single-bore, double-bore (2-hole), multi-bore, or closed-end alumina ceramic tubes, ADCERAX can meet your requirements.
Open-both-ends alumina tube for high-temperature, insulation and general furnace use.
Ceramic alumina close one end tube use in sensor protection, vacuum systems, or furnace liners.
Square Alumina ceramic pipe for Structural Insulation or custom slot assemblies.
Customization are available upon request, including flanged, stepped, threaded, slotted.
Ideal for thermocouple protection and dual-channel sampling.
Alumina four bores tube for dual-channel thermocouples and electrical isolation.
Industrial nine-bore alumina tube for multi-sensor and multi-path instrumentation.
This tube for complex assemblies requiring multiple internal channels.
Alumina porous tube for Filtration, Gas Diffusion, or Pressure Equalization
Alumina tube furnace for High-Temp Heating and Thermal Processing
Alumina insulator tube for Abrasion and Corrosion Resistance in Fluid Systems
Alumina insulator tube for Electrical Isolation and Thermal Barrier
🔎Open-end/single-bore tube: sleeve, insulation, protection and general passage applications where both ends remain open.
🔎 Closed-end tube: thermocouple and sensor protection when the hot end must be sealed.
🔎 Multi-bore / 2-hole / 4-bore / 9-hole tube: separated sensor, wire or heating-element channels; route exact bore-count demand to the matching product page when available.
🔎 Furnace/work tube: tube furnace work-zone or replacement tube body; not a complete tube furnace.
🔎 Insulation tube: heater, sensor and electrical isolation assemblies where ceramic fit and bore size affect installation.
Not sure which fits?
Send your application, bore count and dimensions and we will recommend a type.
🔹Why alumina: a dense, electrically insulating, chemically stable work tube that holds samples and separates the hot zone in tube furnaces and thermal processing.
🔹What to confirm: working temperature, atmosphere (air / inert / reducing / vacuum), heating & cooling rate, support method and sealing.
🔹What to send: OD, ID, length, wall thickness, end type and your process conditions.
🔹Why alumina: a closed-one-end ceramic sheath that protects a thermocouple or sensor from furnace gases while keeping it electrically isolated.
🔹What to confirm: sensor diameter, insertion length, open or closed end, mounting and temperature.
🔹What to send: sensor size, required insertion length, OD/ID and operating temperature.
🔹Why alumina: single- or multi-bore tubes route and isolate multiple conductors, heater wires or sensor leads.
🔹What to confirm: bore count, bore diameter, centre spacing and OD.
🔹What to send: bore count, bore diameter, OD, length and a drawing if multi-bore.
🔹Why alumina: chemically stable tubing for reaction channels, gas delivery and fluid transport in demanding environments.
🔹What to confirm: medium, atmosphere, pressure and sealing interface.
🔹What to send: medium, working pressure, temperature, OD/ID and connection type.
ADCERAX alumina tubes and ceramic parts are widely used to solve high-temperature insulation, wear resistance, corrosion resistance, and electrical isolation challenges across industrial and laboratory applications.
ADCERAX offers custom alumina ceramic tubes in 96%, 99% and 99.7% Al2O3, with material selection based on operating temperature, insulation requirements, wear conditions, atmosphere and application environment.
Withstand continuous operating temperatures up to 1730°C for 99.7% purity grade
Excellent resistance to abrasion and wear, extending component lifespan
Superb electrical insulator with high dielectric strength
Remarkable resistance to chemical attack from acids and alkalis
| Property | 96% Al₂O₃ | 99% Al₂O₃ | 99.7% Al₂O₃ |
|---|---|---|---|
| Standard Grade | IEC C-786 / ASTM Type II | IEC C-795 / ASTM Type III | IEC C-799 / ASTM Type IV |
| Density | 3.65–3.8 g/cm³ | 3.8–3.9 g/cm³ | ≥3.93 g/cm³ |
| Flexural Strength | 260 MPa | 300 MPa | 330 MPa |
| Hardness | Mohs 8.8 | Mohs 9 | Mohs 9.1 |
| Thermal Conductivity | 22 W/m·K at 20°C | 24 W/m·K at 20°C | 29 W/m·K at 20°C |
| Max Operating Temperature | 1600°C | 1680°C | 1730°C |
| Volume Resistivity | 10¹³–10¹⁵ Ω·cm at 20°C | 10¹⁴–10¹⁵ Ω·cm at 20°C | ＞10¹⁵ Ω·cm at 20°C |
| Typical Use | General high-temperature and wear applications | Higher strength and harsher working conditions | High-purity insulation, vacuum, and demanding thermal environments |
Industry/standard typical values for sintered alumina, confirmed for ADCERAX grades; final values per part confirmed during engineering review.
Looking for a custom alumina tube supplier? We provide OEM solutions with fast delivery, precision machining, and expert support for your demanding application.
ADCERAX reviews custom alumina ceramic tubes from drawings, samples, photos or replacement part references. We support open-end, closed-end, single-bore, multi-bore, furnace/work tube and thermocouple protection tube requirements, with OD, ID, wall thickness and lengths up to 3500 mm confirmed by tube geometry, material grade and process review.
Three Ways to Start
Send a PDF, STEP or DWG with OD, ID, length, wall thickness, bore layout and tolerances. Our engineers review material fit, geometry and feasibility before quoting.
Send measurements or a photo of the part you want to match or replace. We rebuild to the original fit for furnace, work and protection tubes.
Not sure of the exact spec? Tell us the application, temperature, atmosphere and the conditions the tube must survive, and we recommend a tube type and dimensions.
You share drawing / sample / application and working conditions.
ADCERAX engineers review material, dimensions, tolerance and feasibility.
We confirm what can be made, raise any open questions, and quote.
Optional prototype or sample step before a production run.
A clear custom tube review depends on geometry, working conditions and fit requirements: OD, ID, length, wall thickness, bore count, temperature, atmosphere and the tolerance that matters most for your assembly.
ADCERAX is a China-based advanced technical ceramics manufacturer focused on custom alumina ceramic tubes. We review drawings, samples and working conditions to confirm material, dimensions and feasibility before quoting, and support export shipping worldwide.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
24-hour dispatch for standard items, 3-5 weeks for custom orders.
Where alumina is not the best fit — for example needs centered on extreme toughness (zirconia), high thermal conductivity or thermal-shock-heavy duty (silicon carbide), or non-tube parts — tell us your application and we will point you to a better-fit option. Certificates such as material or dimensional reports can be discussed per project during the RFQ.
ADCERAX is a professional China alumina ceramics tube manufacturer that offers high-performance components with tight tolerances (±0.005mm) and custom geometries. Using advanced forming methods and CNC machining, we deliver precision-engineered solutions for electronics, chemical, and high-temperature applications.
This table highlights our core technical strengths, including material options, tight tolerances, and advanced manufacturing methods. We offer tailored solutions to meet diverse industrial requirements.
| Technical Capabilities Overview | |
|---|---|
| Material Grades | 96%, 99%, 99.5%, 99.7% Al₂O₃ – high purity for demanding applications |
| Tolerances | Up to ±0.001mm – suitable for precision assemblies |
| Forming Methods | Dry pressing, isostatic pressing, extrusion, casting, injection molding |
| Processing | CNC machining, fine grinding, polishing |
| Customization | Drawings, CAD files, or samples accepted for custom parts |
If any of the cases below match your process, our engineers can recommend a better-fit ceramic option.
— silicon carbide may suit better.
— alumina is opaque; ask about transparent ceramics or quartz.
— a lower-cost ceramic or fiber option may be enough.
Pick by application and structure: open-end or closed-end, single-bore or multi-bore, and bore count. Tell us your application, temperature and dimensions and we will recommend a type.
A single-bore tube has one central hole for basic insulation or routing; a multi-bore tube (such as 2-hole, 4-bore or 9-hole) has several parallel bores to isolate multiple conductors or sensors.
Please provide OD, ID, length, wall thickness, bore count, open or closed end, operating temperature, atmosphere, target application, drawing or sample, and quantity.
Yes. We review drawings, sketches, samples or old-part measurements for material, tolerance and application fit, then confirm feasibility before quoting.
Furnace work tubes are usually open-end tubes selected by temperature, atmosphere and size; thermocouple protection tubes are usually closed-one-end tubes selected by sensor size and insertion length. Confirm your working conditions for the correct choice.
Send your application for a custom RFQ
To quote an alumina ceramic tube, please send:
Send what you have — even a drawing or a sample is enough to start. Our engineers review material, tolerance and feasibility before quoting.
*Our team will answer your inquiries within 24 hours.
*Your information will be kept strictly confidential.
info@adcerax.com
Tel.:+(86) 0731-74427743
WhatsApp: +(86) 19311583352
Within 24 hours
The more details you provide, the faster we can respond.
*We respond within 24 hours. All inquiries are confidential.
The more details you provide, the faster we can quote.
*We respond within 24 hours. All inquiries are confidential.
