Great Ceramic’s Metallized Ceramic Parts for Brazing utilize proprietary Mo/Mn and Mo/Mn/W metallization coatings to enable robust, hermetic ceramic?to?metal brazed joints. These parts are compatible with a range of advanced ceramics, including alumina (Al?O?), aluminum nitride (AlN), zirconia (ZrO?), and silicon nitride (Si?N?).

These metallized surfaces grant ceramics welding capability, electrical connectivity, vacuum compatibility, mechanical strength, and thermal robustness—ideal for feedthroughs, vacuum electronic packaging, and high?reliability metallized substrates.

Key Features and Benefits:

• Hermetic Seal Integrity: Helium leak rate ≤?1×10?¹¹?Pa·m³/s
• Mechanical Strength: Average tensile strength ≥?130?MPa; single-point up to 100–130?MPa
• Thermal Shock Resistance: Survives six cycles between 600?°C and room temperature without cracking or leakage
• Multiple Metallization Options: Mo?Mn, Mo?Mn/W, active brazing alloys (ABA), and thick film methods
• Post?processing Plating: Available nickel, gold, silver, or tin plating to enable brazing with copper, Kovar, stainless steel, etc.

Applications:

• Power Electronics: Packaging for IGBT modules, DBC/AMB substrates, power devices, and semiconductor assemblies
• Vacuum & Hermetic Sealing: X?ray tubes, RF/particle accelerator components, high?vacuum sensors, ceramic?to?metal feedthroughs
• Medical Devices: Biocompatible, plated metallized ceramics for implantable pacemakers, diagnostic equipment, and surgical instruments

Customization & Processing Capabilities:

• Full customization to customer drawings, with high precision machining: standard tolerance ±0.01?mm, precision parts up to ±0.001?mm
• Wide range of machining processes including CNC milling, grinding, polishing, laser cutting, injection molding, extrusion, etc.
• Flexible metallization application methods (banding, brush, spray, screen printing, needle dispensing) for flat, curved, and hollow geometries

Typical Material Properties (e.g. for alumina variants):

Great Ceramic offers metallized alumina ceramics from 95% to 99.7% purity, with performance metrics such as:

• Bulk density ≥?3.67–3.90?g/cm³

• Compressive strength ≥?1.8–2.3?GPa, flexural strength ≥?300–400?MPa

• Thermal conductivity ~10–21?W/m·K (higher at ≥?99% purity)

• Leak rate ≤?1×10?¹¹?Pa·m³/s

• Thermal shock tolerance (600?°C ↔ room temp, six cycles) without failure

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