Metallized Ceramic Rings
Metallized Alumina Ceramic Stepped Ring
Custom metallized alumina ceramic stepped rings with selective Mo-Mn metallization and optional nickel, silver or gold finishes for reliable ceramic-to-metal joining.
Component Types
Metallized Alumina Ceramic Stepped Ring 02
Metallized Alumina Ceramic Stepped Ring 03
Technical Specifications
| Parameter | Typical Value / Range | Unit |
|---|---|---|
| Al₂O₃ Purity | 95-99 | % |
| Bulk Density | ≥ 3.63 | g/cm³ |
| Thermal Conductivity (25°C) | 22.45 | W/m·K |
| Coefficient of Thermal Expansion (20–1000°C) | 8.26 | ×10⁻⁶/°C |
| Flexural Strength | ≥340 | MPa |
| Dielectric Strength | ≥8.3 | kV/mm |
| Dielectric Constant (1 MHz) | 9.1 | @1MHz |
| Dielectric Loss (1 MHz) | ≤0.0004 | @1MHz |
| Metallization Layer (Mo/Mn) | 15–25 | μm |
| Plating Layer (Ni/Cu/Au etc.) | 8–10 | μm |
Al₂O₃ Purity
- Typical Value / Range
- 95-99
- Unit
- %
Bulk Density
- Typical Value / Range
- ≥ 3.63
- Unit
- g/cm³
Thermal Conductivity (25°C)
- Typical Value / Range
- 22.45
- Unit
- W/m·K
Coefficient of Thermal Expansion (20–1000°C)
- Typical Value / Range
- 8.26
- Unit
- ×10⁻⁶/°C
Flexural Strength
- Typical Value / Range
- ≥340
- Unit
- MPa
Dielectric Strength
- Typical Value / Range
- ≥8.3
- Unit
- kV/mm
Dielectric Constant (1 MHz)
- Typical Value / Range
- 9.1
- Unit
- @1MHz
Dielectric Loss (1 MHz)
- Typical Value / Range
- ≤0.0004
- Unit
- @1MHz
Metallization Layer (Mo/Mn)
- Typical Value / Range
- 15–25
- Unit
- μm
Plating Layer (Ni/Cu/Au etc.)
- Typical Value / Range
- 8–10
- Unit
- μm
Detailed Product Information
Metallized Alumina Ceramic Stepped Ring
TecCera supplies custom metallized alumina ceramic stepped rings for ceramic-to-metal joining, electrical insulation and hermetic sealing applications. Metallization can be applied to selected flat, cylindrical or stepped surfaces according to the customer’s drawing.
A typical metallization system consists of a molybdenum-manganese (Mo-Mn) base layer followed by nickel plating. Silver, gold and other surface finishes can also be provided when required. The metallized areas are designed to support subsequent brazing or soldering to compatible metal components.
Typical Specifications
- Product: Metallized alumina ceramic stepped ring
- Ceramic material: 95%, 96% or 99% alumina (Al₂O₃)
- Appearance: White ceramic with metallic coating
- Base metallization: Mo-Mn
- Typical metallization thickness: 15–25 μm
- Optional plating: Ni, Ag, Au or other specified finishes
- Typical plating thickness: 8–10 μm
- Dimensions and tolerances: Custom-made according to drawings
- Brand: TecCera
The values above are typical options rather than guaranteed specifications. Final materials, layer thicknesses and tolerances should be confirmed for each drawing and application.
Key Features
- High electrical insulation and good mechanical stability.
- Metallization can be selectively applied to stepped and complex ceramic surfaces.
- Dense and uniform metallized layers with good wettability for brazing or soldering.
- Good resistance to wear, heat and corrosion.
- Suitable for ceramic-to-metal assemblies requiring reliable mechanical bonding.
- Hermetic sealing performance can be developed and verified according to the assembly design and testing requirements.
Typical Applications
- Electrical feedthrough insulators
- Vacuum interrupters and switching components
- High-voltage and high-frequency electrical assemblies
- Sensor and power-module packages
- Vacuum electronic components
- Insulating rings, discs and cylindrical components
- X-ray and RF/microwave equipment
- Custom ceramic-to-metal sealed assemblies
Available Metallization and Finishing Options
- Alumina ceramic + Mo-Mn metallization + nickel plating
- Alumina ceramic + Mo-Mn metallization + silver finish
- Alumina ceramic + Mo-Mn metallization + gold plating
- Alumina ceramic + screen-printed silver metallization
- Custom metallization patterns and surface finishes
Information Required for Quotation
Please provide the following information:
- Ceramic grade
- Drawing, dimensions and tolerances
- Metallized area and pattern
- Required metallization and plating system
- Brazing or soldering method
- Mating metal material
- Operating temperature and environment
- Hermeticity or joint-strength requirements
- Prototype and production quantities
TecCera will review the application requirements and recommend an appropriate ceramic grade, metallization system and surface finish.