Product Name:
Focusing Electrode Assembly Ceramic Components
Product Material:
High-Purity Aluminum Nitride Ceramic (AlN), and specific-structured Boron Nitride (BN) / Beryllium Oxide (BeO) Composite Gradient Materials
Material Characteristics:
High thermal conductivity (AlN: 180-220 W/m·K), Excellent electrical insulation (Volume resistivity >10¹⁴ Ω·cm), Low and tunable dielectric constant, High dielectric strength (>15 kV/mm), Exceptional high-temperature stability and thermal shock resistance, Extremely low coefficient of thermal expansion (AlN: 4.5×10⁻⁶/°C), Ultra-high vacuum compatibility (very low outgassing), Outstanding resistance to electron/ion bombardment, Low radiation-induced conductivity
Application Fields:
Electron beam & ion beam focusing systems, High-energy physics experimental setups, Particle accelerators, Electron microscopes, Mass spectrometers, X-ray tubes, Traveling-wave tubes (TWTs), Klystrons
Application Industries:
Semiconductor manufacturing and inspection equipment, Scientific instruments and high-end analytical equipment, Aerospace (space propulsion, communications), Defense electronics (radar, electronic warfare), Medical equipment (radiation therapy, imaging)
Processing Difficulties:
Achieving sub-micron surface accuracy and complex curvatures, Ensuring electrical insulation integrity under extreme thermal conduction, Controlling microstructure to optimize secondary electron emission coefficient, Avoiding contamination or stress cracks during machining, Achieving high-reliability ceramic-metal vacuum brazing or sealing, Guaranteeing dimensional stability under thermal cycling and radiation environments
Processing Flow:
High-purity powder preparation and slurry processing → Tape casting or gel casting → Pressureless sintering or hot pressing sintering → Precision CNC grinding and drilling → Laser precision machining (micro-holes, complex contours) → Ultra-precision polishing (Ra < 0.05 µm) → Surface metallization (Mo-Mn method or active metal brazing) → Rigorous cleaning and outgassing → Electrical and thermal performance testing → Helium mass spectrometer leak detection → Cleanroom packaging
Delivery Period:
Standard geometry components: 60-90 days
Customized high-precision/composite structure components: 90-150 days (including testing and certification reports)
Focusing Electrode Assembly Ceramic Components are precision core elements designed for high-energy beam control and microwave vacuum electronic devices. These components must operate stably under extreme conditions including ultra-high vacuum, strong electric fields, high thermal loads, and particle radiation, imposing nearly contradictory comprehensive requirements on the material's thermal conductivity, insulation, vacuum compatibility, and radiation resistance. Utilizing high-purity Aluminum Nitride (AlN) ceramic as the base material, combined with specific composite structures, we provide performance solutions for focusing systems that are unmatched by traditional metals or oxide ceramics.
Key Features:
Exceptional Balance of High Thermal Conductivity and Electrical Insulation – Aluminum Nitride ceramic possesses high thermal conductivity (>180 W/m·K)接近 that of metals, while maintaining excellent electrical insulation (dielectric strength >15 kV/mm). This enables rapid dissipation of concentrated heat generated by beam bombardment, effectively preventing performance drift or component failure due to heat accumulation, and ensuring the long-term stability of the focusing field.
Superior Vacuum Stability and Radiation Resistance – The material exhibits extremely low outgassing rates and good sputtering resistance, helping to maintain the ultra-high vacuum environment required by the system. Its stable crystal structure offers high tolerance to electron, ion, or gamma radiation, significantly reducing material degradation (such as changes in conductivity) caused by long-term radiation exposure, thereby ensuring the equipment's service life in radiative environments.
Precision Machining and Metallization Capability – Through advanced forming and ultra-precision machining technologies, we can manufacture focusing electrodes with complex geometries, micron-level apertures, and ultra-smooth surfaces (Ra < 0.05 µm). Reliable ceramic-metal sealing technology ensures the component maintains structural integrity and vacuum seal even under severe thermal cycling, meeting the most stringent equipment integration requirements.
