Metalized alumina ceramic tubes are precision ceramic tube parts used when an insulating ceramic body needs to be connected with metal components. The alumina ceramic tube provides electrical insulation, mechanical strength and thermal stability, while the metalized surface creates a reliable bonding area for brazing, soldering or ceramic-to-metal connection.
This product is different from standard alumina ceramic tubes because the metalized area can be designed according to the assembly structure. The metalized layer can be applied on the tube end, outer diameter ring, inner bore section or other specified bonding areas.
The ceramic body is usually made from 95%, 96%, 99% or 99.5% Al₂O₃ alumina ceramic. Different alumina grades can be selected according to insulation performance, working temperature, mechanical strength and cost requirements.
Metalized alumina ceramic tubes are suitable for applications that require electrical insulation, dimensional stability and reliable bonding with metal parts. They are often used as the ceramic section in vacuum, electrical, sensor and electronic packaging assemblies.
| Item | Available Options |
|---|---|
| Base Material | 95%, 96%, 99% or 99.5% Al₂O₃ alumina ceramic |
| Product Shape | Straight tube, stepped tube, hollow tube or custom tubular part |
| Key Dimensions | Outer diameter, inner diameter, wall thickness, length and shoulder design |
| Metalized Area | End face, outer diameter ring, inner bore section or specified bonding zone |
| Metallization Process | Mo-Mn, tungsten or customized metallization process |
| Plating Options | Nickel plating, gold plating or other plating according to brazing requirements |
| Machining Options | Grinding, polishing, drilling, slotting and precision dimension control |
| Inspection Options | Dimension check, visual inspection, metalized area inspection and bonding surface check |
| Customization | Available according to drawings, samples or assembly requirements |
| Product Type | Main Difference | Typical Use |
|---|---|---|
| Standard Alumina Ceramic Tubes | Insulating ceramic tube without metalized bonding surface | Insulation sleeves, protection tubes and structural ceramic tube parts |
| Metalized Alumina Ceramic Tubes | Alumina tube with selected metalized areas for joining with metal parts | Vacuum feedthroughs, sensors, electronic packaging and sealed tube assemblies |
| Metalized Ceramic Components | Includes plates, rings, discs, tubes and other ceramic shapes with metalized surfaces | General ceramic-to-metal bonding and customized electronic assembly applications |
| Ceramic-to-Metal Sealing Assemblies | Finished assemblies made by joining ceramic parts with metal parts | Hermetic sealing, vacuum devices, high-voltage feedthroughs and electronic packages |
They are used in vacuum feedthroughs, sensor housings, electronic packaging, laser modules, microwave components and high-voltage insulation systems where a ceramic tube needs to connect with metal parts.
Standard alumina tubes mainly provide insulation and mechanical support. Metalized alumina ceramic tubes include a metalized bonding area, allowing the ceramic tube to be brazed, soldered or assembled with metal components.
Yes. The metalized area can be placed on the tube end, outer diameter, inner bore or a specific ring position according to the customer’s drawing.
Common options include 95%, 96%, 99% and 99.5% alumina ceramic. The suitable grade depends on the required insulation, strength, temperature resistance and budget.
Nickel plating and gold plating are commonly used. Other plating or surface finishes can be discussed according to the brazing or soldering process.
Yes. We can customize the outer diameter, inner diameter, length, wall thickness, step structure, hole design and metalized band position according to drawings or samples.
Yes. Metalized alumina ceramic tubes are often used in vacuum feedthrough structures where insulation and a stable ceramic-to-metal bonding surface are required.
Yes. If you provide the assembly drawing, metal part material and working conditions, we can help review the tube structure, metalized area and plating option.
Yes. Prototype samples and small-batch orders are available before volume production, especially for new tube designs or customized assembly projects.
Please provide the drawing, material grade, OD, ID, length, tolerance, metalized area, plating requirement, application environment and estimated order quantity.
