Metallized Ceramic Components
Metallized Alumina Ceramic Insulator for CT and X-Ray Tubes
Precision Metallized Alumina Ceramic Insulator for X-ray tube, CT imaging and high-voltage vacuum applications, with optional Ni, Cu or Au plating.
Product Description
TecCera supplies precision Metallized Alumina Ceramic Insulator for CT and X-Ray Tubes for X-ray tube, CT imaging and other high-voltage vacuum applications.
These components are typically manufactured from 95%–99% alumina ceramic and metallized with a controlled molybdenum-manganese layer. Nickel, copper or gold plating can be applied according to brazing, sealing and assembly requirements.
The combination of high electrical insulation, mechanical strength, vacuum compatibility and brazable metallized surfaces makes these components suitable for ceramic-to-metal assemblies used in X-ray tubes, high-voltage feedthroughs and vacuum electronic systems.
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Technical Specifications
|
No. |
Parameter |
Typical Value / Specification |
Unit |
|
1 |
Alumina Purity |
95% / 99% |
% |
|
2 |
Bulk Density |
≥ 3.63 |
g/cm³ |
|
3 |
Thermal Conductivity at 25°C |
22.45 |
W/m·K |
|
4 |
Coefficient of Thermal Expansion, 20–1000°C |
8.26 × 10⁻⁶ |
/°C |
|
5 |
Flexural Strength |
≥ 340 |
MPa |
|
6 |
Dielectric Strength |
≥ 8.3 |
kV/mm |
|
7 |
Dielectric Constant at 1 MHz |
9.1 |
— |
|
8 |
Dielectric Loss at 1 MHz |
≤ 0.0004 |
— |
|
9 |
Mo-Mn Metallization Layer |
15–25 |
μm |
|
10 |
Ni / Cu / Au Plating Layer |
8–10 |
μm |
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Key Features
High Electrical Insulation
Alumina ceramic provides stable dielectric performance for high-voltage X-ray and vacuum electronic applications.
Reliable Mo-Mn Metallization
The metallized surface provides a suitable interface for subsequent plating and ceramic-to-metal brazing.
Vacuum-Compatible Ceramic Material
High-purity alumina is widely used in vacuum electronic assemblies due to its low electrical conductivity, dimensional stability and thermal resistance.
Custom Metallization Areas
Metallization patterns can be applied selectively according to component geometry and customer drawings.
Multiple Plating Options
Nickel, copper and gold plating are available depending on the joining method and operating requirements.
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Typical Applications
These metallized alumina ceramic insulators can be used in:
- Medical X-ray tube assemblies
- CT tube components
- Industrial X-ray systems
- High-voltage vacuum tubes
- Anode and cathode support structures
- High-voltage feedthroughs
- Vacuum electronic assemblies
- Hermetic ceramic-to-metal packages
- Electron beam equipment
- Custom high-voltage insulation components
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Ceramic-to-Metal Sealing
For X-ray and CT tube applications, metallized alumina ceramics are commonly used where ceramic insulation must be joined with metal components.
A typical structure may include:
- Alumina ceramic substrate
- Mo-Mn metallization layer
- Nickel or other metal plating
- Brazing alloy
- Compatible metal component
Metal selection and brazing conditions should be determined according to thermal expansion, geometry and operating requirements.
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Custom Design Options
TecCera supports custom metallized ceramic insulators according to drawings and technical specifications.
Customizable parameters include:
- Outer diameter
- Inner diameter
- Overall height
- Hole quantity and hole diameter
- Hole position
- Alumina purity
- Metallization area
- Metallization thickness
- Plating material
- Plating thickness
- Dimensional tolerance
- Surface finish
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Manufacturing Process
A typical process includes:
1. Ceramic Forming
Alumina material is formed into the required geometry.
2. Precision Machining
Critical dimensions, holes and sealing surfaces are machined according to the drawing.
3. Cleaning
Ceramic surfaces are cleaned before metallization.
4. Mo-Mn Metallization
Metallization is selectively applied to the required joining areas.
5. High-Temperature Firing
The metallized layer is fired to establish a strong bond with the alumina substrate.
6. Metal Plating
Nickel, copper or gold plating may be applied depending on the brazing process.
7. Inspection
Dimensions, surface condition and metallization quality are inspected before shipment.
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FAQ
Why is alumina ceramic used in X-ray tube insulators?
Alumina combines high electrical insulation, mechanical strength and thermal stability, making it suitable for high-voltage vacuum assemblies.
Why is Mo-Mn metallization used?
Mo-Mn metallization provides a brazable surface on alumina ceramics and is widely used in ceramic-to-metal joining applications.
Can the hole pattern and metallization area be customized?
Yes. Hole quantity, hole position, ceramic dimensions and metallization areas can be manufactured according to customer drawings.
What plating options are available?
Typical plating options include nickel, copper and gold, depending on the brazing and application requirements.
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Request a Quote
Looking for a custom metallized alumina ceramic insulator for X-ray or CT tube applications?
Send us your drawing, dimensions, hole layout, metallization area and operating requirements. TecCera can evaluate the ceramic structure, metallization design and plating requirements for your project.
Technical Resources
Download the TecCera brochure for metallized alumina components, ceramic-to-metal brazed assemblies, hermetic seals, and vacuum feedthrough solutions.
Download Metallized Ceramics Brochure (PDF)How to Get a Quote
Send us your drawing or technical requirements. We will review the material, dimensions, tolerances and application conditions before quotation.
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Need a Custom Ceramic Component?
Send us your drawing, dimensions, material requirements, quantity and application conditions.
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