Ceramic-to-Metal Sealing Assemblies

Ceramic-to-Metal Sealing Assemblies
TecCera provides custom ceramic-to-metal sealing assemblies for high-vacuum, high-voltage, electronic, semiconductor, scientific, and industrial applications.
Our capabilities cover the complete process from ceramic and metal component design to machining, high-temperature metallization, surface treatment, vacuum brazing, and final ceramic-to-metal sealing. Products can be manufactured according to customer drawings, samples, or application requirements.
Manufacturing Capabilities
Custom Manufacturing
Products can be manufactured according to customer drawings or physical samples. Custom engineering and structural design services are also available for specific applications.
Ceramic Materials
Ceramic-to-metal assemblies are primarily manufactured using:
* 95% Alumina (Al₂O₃)
* 99% Alumina (Al₂O₃)
Available ceramic forming processes include:
* Hot pressing / hot casting
* Cold isostatic pressing (CIP)
* Dry pressing
* Other forming processes according to component geometry
Metal Materials
A range of vacuum-compatible metals can be joined with metallized alumina ceramics, including:
* Stainless steel
* Kovar
* Molybdenum
* Nickel
* Other specialized vacuum-grade metal alloys
Integrated Ceramic and Metal Processing
TecCera can provide:
* Ceramic component design
* Precision ceramic machining
* High-temperature ceramic metallization
* Metal component design and machining
* Metal surface treatment
* Ceramic-to-metal joining
* Vacuum brazing
* Customized sealed assemblies
This integrated capability helps improve dimensional matching, sealing reliability, and consistency between ceramic and metal components.
High-Temperature Metallization
Ceramic surfaces are metallized using high-temperature processes to create a reliable bonding interface between alumina ceramics and metal components.
Metallization patterns, dimensions, and coating areas can be customized according to the sealing structure and application requirements.
Vacuum Brazing and Controlled-Atmosphere Joining
Depending on component geometry, materials, and operating conditions, ceramic-to-metal assemblies can be joined using:
* Vacuum brazing
* Hydrogen-atmosphere brazing
Typical brazing temperatures can reach approximately 800°C.
For special applications, customized brazing processes with higher joining temperatures, such as 1000°C, can also be developed according to customer requirements and material compatibility.
Typical Performance
Parameter Typical Specification
Ceramic Material 95% / 99% Alumina
Metal Materials Stainless Steel, Kovar, Molybdenum, Nickel, etc.
Joining Process Vacuum Brazing / Hydrogen-Atmosphere Brazing
Typical Brazing Temperature Up to 800°C
Special Brazing Temperature Up to 1000°C, depending on design
Helium Leak Rate ≤ 1 × 10⁻¹⁰ Pa·L/s*
Sealing / Bond Strength Up to 120 MPa
Customization Drawings, samples, or custom engineering
*Leak-rate specification should be confirmed according to the actual test method and unit used for each product.
Applications
Vacuum Electronics
Ceramic-to-metal sealing assemblies are widely used in vacuum electronic systems, including:
* Vacuum electrodes
* Vacuum gauge tubes
* Communication devices
* Transmitting tubes
* Microwave tubes
* X-ray tubes
* Discharge tubes
* Vacuum interrupters
* Electron and image intensifier components
* Vacuum display devices
Microelectronics and Semiconductor
Applications include:
* Semiconductor devices
* Integrated circuits
* Power electronics
* Power modules
* Hermetic electronic packages
* Co-fired electronic components
* Semiconductor vacuum equipment
Laser and Infrared Systems
Ceramic-to-metal sealed components can be used in:
* Laser resonators
* Laser output assemblies
* Discharge tube electrodes
* Thermal imaging systems
* Infrared detection equipment
* Night-vision systems
Lighting Technology
Typical applications include:
* High-pressure sodium lamps
* Metal-halide lamps
* Tungsten-halogen lamps
* Flash lamps
* Specialty lighting devices
High-Energy Physics and Aerospace
Suitable applications include:
* Particle accelerators
* Electron-positron collider systems
* Scientific detectors
* High-voltage probes
* High-voltage sensors
* Aerospace vacuum systems
Energy and Automotive
Applications include:
* High-energy batteries
* Long-life battery systems
* Thermionic devices
* Spark plugs
* Ceramic engine components
* Automotive sensors
* Specialized energy-conversion equipment
Chemical and Process Industries
Typical applications include:
* Chemical reactor sealing assemblies
* Pump and plunger components
* Heat exchangers
* Corrosion-resistant sealed structures
Industrial Measurement
Ceramic-to-metal components are also used in:
* Thermocouple assemblies
* Vacuum observation windows
* Electrical feedthroughs
* Vacuum instrumentation
* Measurement and sensing equipment
Nuclear and Research Equipment
Applications include specialized ceramic-to-metal components for:
* Nuclear research systems
* Reactor instrumentation
* Vacuum scientific equipment
* High-energy experimental systems
Custom Ceramic-to-Metal Solutions
TecCera supports custom ceramic-to-metal sealing projects from prototype development to production.
Customers can provide drawings, samples, operating conditions, vacuum requirements, electrical requirements, ceramic materials, and metal materials. Our team can support ceramic design, metallization, metal machining, brazing, and final assembly according to specific technical requirements.