Metallized Ceramics Solution

At Große Keramik, we specialize in metallized ceramics solutions tailored for high-performance industrial and electronic applications. With a strong foundation in advanced ceramic machining, we deliver custom ceramic metallization services that enable robust, high-temperature, and hermetically sealed ceramic-to-metal assemblies.

Whether your application requires ceramic-to-metal feedthroughs, vacuum electronic packaging, oder high-reliability metallized substrates, our engineering and processing capabilities ensure consistent quality and high-performance results.

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Metallized Ceramics: Advanced Ceramic Metallization Services

What are Metallized ceramics?

Metallized ceramics represent a cornerstone in modern ceramic packaging technology, enabling reliable, high-strength, and hermetically sealed joints between ceramic and metal components. By depositing a functional metal layer onto an insulating ceramic surface, we create surfaces that support brazing ceramics to metal, vacuum electronic packagingund electrical connectivity while retaining the intrinsic benefits of advanced ceramics.

Why Metallized Ceramics?

Ceramics such as Tonerde (Al₂O₃), aluminum nitride (AlN), Zirkoniumdioxid (ZrO₂)und Siliziumnitrid (Si₃N₄) possess excellent thermal stability, wear resistance, and electrical insulation. However, they are difficult to bond directly to metals due to poor wettability and mismatched thermal expansion.

Metallization technology overcomes these limitations by forming a metallurgical bond between ceramic and metal via various methods—enabling:

  • Electrical insulation with metal connectivity
  • Hohe mechanische Festigkeit
  • Excellent vacuum compatibility
  • High temperature and corrosion resistance
  • Stable hermetic sealing with metals

What We Do: Ceramic Metallization Capabilities

Great Ceramic delivers high-reliability metallized ceramics using proprietary Mo/Mn and Mo/Mn/W coatings, enabling precise, hermetic ceramic-to-metal brazing. With in-house plating, tight-tolerance machining, and full testing for strength and seal integrity, we provide custom solutions for medical, electronic, power, and sensor applications. The metallization performance indicators are as follows:

  • Vacuum air tightness: Leakage rate ≤1×10-11Pa.m³/s

  • Mechanical strength: Average tensile strength ≥130MPa, Single point tensile strength ≥100130MPa.

  • Thermal shock performance: 6 times between 600℃ and room temperature, no cracking or leakage

Metallization Techniques Offered

Our experts work with you to select the best metallization materials and processes to achieve reliable, high-strength brazed joints, even in challenging geometries.

  • Mo-Mn (Molybdenum-Manganese Metallization)
  • Mo-Mn/W
  • Active Brazing Alloys (ABA)
  • Thick Film Metallization

Metallization Application Methods

We will choose the appropriate method based on the product structure (cylindrical, flat, inner hole) as well as batch and precision requirements.

  • Outer Diameter & Inner Diameter Banding
  • Brush
  • Screen Printing
  • Spray
  • Needle

Metallized ceramic case

We will custom produce metallized alumina ceramics for ultra-high vacuum feedthroughs, vacuum isolator flanges, gas discharge tubes, grid tubes, vacuum circuit breakers, vacuum capacitors and similar applications according to customer drawings and requirements.

Metallized Ceramic Insulator

Metallized Ceramic Insulator

Vacuum Ceramic Component

Vacuum Ceramic Component

Metallized Ceramic Insulator

Metallized Ceramic Insulator

Metallized Ceramic Ring

Metallized Ceramic Ring

Optional metallized ceramic materials

We offer a wide range of high purity metallized alumina ceramic components (95%~99.7% purity) for thick film metallization of molybdenum (Mo-Mn) and tungsten (W). The main metallization methods used include screen printing or vacuum sputtering, followed by electroplating or chemical plating on the metallized surface with nickel, gold, silver or tin. In this way, ceramics can be welded with oxygen-free copper, Kovar, stainless steel and other alloys. The material parameters are as follows:

Titel des Projekts Einheit 96% Al2O3 97% Al2O3 99% Al2O3 99.6% Al2O3
Tonerdegehalt % Al2O3≧95% Al2O3≧97% Al2O3≧99% Al2O3≧99.6%
Größenbereich mm 0.5-500 0.5-500 0.5-500 0.5-500
Höchste Genauigkeit mm 0.01 0.01 0.01 0.01
Schüttdichte g/cm3 ≧3.67 ≧3.70 ≧3.85 ≧3.90
Biegefestigkeit MPa (25℃) ≧300 ≧300 ≧350 ≧400
Druckfestigkeit GPa (25℃) ≧1.8 ≧1.8 ≧2.0 ≧2.3
Wärmeleitfähigkeit W/m.K 10-20 10-20 15-21 15-21
Durchschnittlicher linearer Ausdehnungskoeffizient /℃ (20～500℃) 7.36×10-6 6.9×10-6 6.9×10-6 6.9×10-6
Dielektrizitätskonstante 1MHz (20℃) 9.1 9.5 9.8 10
Tangenswert des dielektrischen Verlustes 1MHz (20℃) ≦4×10-4 ≦3×10-4 ≦2×10-4 ≦2×10-4
Durchgangswiderstand Ω.cm (100℃) ≧1×1014 ≧1×1014 ≧1×1014 ≧1×1014
DC-Durchschlagsfestigkeit KV/mm ≧30 ≧35 ≧25 ≧25
Temperaturwechselbeständigkeit ℃ 20~800 20~800 20~800 20~800
Maximale Betriebstemperatur ℃ ≦1300 ≦1400 ≦1500 ≦1500
Säureresistenz Allgemein Geeignet Erstklassige Erstklassige
Alkalibeständigkeit Allgemein Geeignet Geeignet Erstklassige
Leichtigkeit der Metallisierung Einfach Normaler Schwierigkeitsgrad Mittlere Schwierigkeit Sehr schwierig
Luftdichtheit Pa-m3/s ≦1×10-11 ≦1×10-11 ≦1×10-10 ≦1×10-9
Durchschnittliche Zugfestigkeit MPa 130 130 130 130

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Applications of Metallized Ceramics

  • Ceramic metallization for power electronics is essential for IGBT modules, SiC power devices, and inverters.
  • DBC and AMB substrates offer high thermal conductivity and electrical isolation.
  • Metallized ceramics improve thermal dissipation and ensure electrical insulation under high-voltage stress.

  • Enables vacuum electronic packaging for X-ray tubes, RF systems, and particle accelerators.
  • Ensures gas-tightness via helium leak-tested hermetic ceramic seals.
  • Used in ceramic-to-metal feedthroughs, connector pins, and high-vacuum sensors.

  • Gold-plated metallized ceramics ensure biocompatibility and corrosion resistance.
  • Used in implantable pacemakers, diagnostic instruments, and surgical tools.

  • Provide temperature-stable, vibration-resistant joints in jet engines and avionics.
  • Withstand thermal shock and high-pressure extremes.

  • Used for chip packaging, electrostatic chucks, and substrates for optoelectronic devices.

Häufig gestellte Fragen (FAQ)

Yes. We offer low-volume prototyping as well as high-volume production.

To create solderable and brazeable surfaces that allow ceramics to be joined to metals without cracking or delamination.

High-purity Tonerde, AlNund MGC are most commonly used depending on the application.

Used in high-voltage applications, sensor housingsund ceramic-to-metal feedthroughs, thanks to its high electrical resistance and bonding capability.

Using helium leak detection, as defined in MIL-STD-883 Method 1014.

Ceramic substrates with metallization designed for power modules, semiconductorsund aerospace electronics—offering excellent thermal conductivity, electrical insulation, and mechanical integrity.

Metallized ceramics, depending on the metal and ceramic used, can operate continuously at temperatures over 800°C, and survive peaks above 1200°C in brazed joints.

Hermetic sealing refers to an airtight seal that prevents gases or liquids from passing through. In semiconductors, vacuum systemsund implants, hermetic seals are critical for preventing contamination and failure.

Yes. Ceramics like AlN und Al₂O₃, when metallized correctly, provide low-loss, high-frequency performance, making them suitable for antenna windows, resonatorsund connectors.

Experte für die Herstellung von Hochleistungskeramik

Customize your metallized ceramic parts

With more than a decade of experience in advanced ceramic manufacturing, Great Ceramic understands that the success of metallized ceramics lies in interface engineering, material compatibility, and tight tolerances. Every step of our process is customized to your design, environment, and joining method.

Whether you are building a one-off prototype or preparing for large-scale production, we support flexible order quantities and serve customers in Europe, North America, and Asia.

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Contact Great Ceramic for custom ceramic surface metallization solutions that meet the highest standards for your application.