Metallized Ceramic Components
Metallized Ceramic Cylinder
Custom metallized ceramic cylinders for ceramic-to-metal brazing and hermetic sealing. Available in 95% or 99% alumina with Mo-Mn metallization and optional nickel, silver, copper, or gold plating for vacuum, high-voltage, medical, and electronic applications.
Component Types
Detailed Product Information
Product Overview
TecCera supplies custom metallized ceramic cylinders for ceramic-to-metal brazing, electrical insulation, and hermetic sealing applications. Manufactured from 95% or 99% alumina, these cylindrical components combine high dielectric strength, mechanical stability, thermal resistance, and vacuum compatibility.
Selective metallization can be specified on the inner diameter, outer diameter, end faces, shoulders, or other designated areas. Molybdenum-manganese (Mo-Mn) is commonly used as the base metallization layer, followed by optional nickel, silver, copper, or gold plating to improve wettability, conductivity, oxidation resistance, and brazing performance.
Compared with glass-to-metal seals, properly engineered ceramic-to-metal assemblies can provide greater resistance to thermal shock, mechanical stress, corrosion, high voltage, and demanding vacuum environments.
Component Types
- Metallized alumina ceramic cylinders
- Cylindrical ceramic feedthrough insulators
- Metallized ceramic tubes and sleeves
- Ceramic vacuum electrode insulators
- Ceramic-to-metal brazing components
- Custom cylindrical ceramic housings
Technical Specifications
|
No. |
Parameter |
Typical Value / Specification |
Unit |
|
1 |
Alumina Purity |
95% or 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 Thickness |
15–25 |
μm |
|
10 |
Ni, Cu, Au or Other Plating Thickness |
8–10 |
μm |
The values above are typical reference data. Actual properties may vary according to alumina purity, component geometry, manufacturing process, and test method.
Material and Surface Options
Base material:
95% or 99% alumina ceramic
Base metallization:
Mo-Mn metallization, typically 15–25 μm
Optional plated layers:
Nickel, silver, copper, gold, or other specified metals
Metallized areas:
Inner diameter, outer diameter, end faces, shoulders, or selected surfaces
Surface treatments:
Glazing, polishing, grinding, lapping, or other specified finishing
Dimensions:
Customized according to customer drawings or samples
Available Joining Configurations
- Alumina ceramic + Mo-Mn metallization + nickel plating
- Alumina ceramic + Mo-Mn metallization + silver plating
- Alumina ceramic + Mo-Mn metallization + gold plating
- Alumina ceramic + printed silver layer
- Custom metallization and plating combinations
Typical Applications
- Electrical and vacuum feedthroughs
- Ceramic headers and electrical terminals
- High-voltage insulating assemblies
- Vacuum interrupters
- Traveling-wave tubes
- Vacuum power tubes
- X-ray tube components
- RF and microwave window assemblies
- Hermetic ceramic-to-metal packages
- High-power electrical receptacles
- Medical and analytical equipment
- Aerospace and industrial electronic systems
Custom Manufacturing
Custom metallized alumina ceramic cylinders are available according to customer drawings or physical samples. For quotation, please provide the alumina grade, dimensions, tolerances, metallized areas, plating requirements, surface finish, operating conditions, and required quantity.
