



Metallized Ceramic Components for Kovar Brazing
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Metallized Ceramic Components for Kovar Brazing with Tight Hermetic Sealing
Material : 96.0% alumina or 99.5% high purity alumina with Metalization treatment
– Either Cold Isostatic Press or dry press formed bodies with secondary fine-machining
– High precision and good appearance after metalization
– Easy for brazing with Kovar alloy directly
– High bonding strength after brazing with kovar parts
– Good insulation, anti-magnetic, static electricity-free character for feedthrough use
– Excellent thermal shock resistance and good thermal stability after brazing
– Outstanding bending strength and toughness
– Anti corrosion & abrasion resistance in harsh working environments
– Professional ceramic R&D team is available for your requests of various metallized ceramic parts
Product Name | Custom Industrial Metallized Ceramic Components for Kovar Brazing with Tight Hermetic Sealing |
Compositions | 96.0% alumina or 99.5% high purity alumina (Al2O3) |
Metalization | Sintered with Molybdenum & Manganese (Mo+Mn), then Nickel plating |
Mo+Mn Layer | 25 +/-10μm in thickness |
Nickel Layer | 2 -10μm in thickness |
Material Density | 3.90 g/cm3 |
Tolerance | +/- 0.005mm |
Finishing | Ra 0.02 |
Max. Using Temperature | 1650 oC |
Using Fields | Feedthrough, Fuel cell, PVD or CVD machines, Power Staions, Semi conductors, Electronics Equipments, Aerospace |
Metallized Ceramic Components for Kovar Brazing
Kovar Alloy Chemical Compositions Sheet | ||||
Elements | Symbol | YB/T 5231 | ASTM F15 | DIN 17745 |
4J29 | K94610 | 1.3981 | ||
Carbon | C | ≤0.03 | ≤0.04 | ≤0.05 |
Silicon | Si | ≤0.30 | ≤0.20 | ≤ 0.30 |
Manganese | Mn | ≤0.50 | ≤0.50 | ≤0.50 |
Phosphorus | P | ≤0.020 | – | – |
Sulphur | S | ≤0.020 | – | – |
Nickel | Ni | 28.5~29.5 | 29.0* | 28.0~30.0 |
Cobalt | Co | 16.8~17.8 | 17.0* | 16.0~18.0 |
Chromium | Cr | ≤0.20 | ≤0.20 | – |
Copper | Cu | ≤0.20 | ≤0.20 | – |
Molybdenum | Mo | ≤0.20 | ≤0.20 | – |
Aluminum | Al | – | ≤0.10 | – |
Magnesium | Mg | – | ≤0.10 | – |
Zirconium | Zr | – | ≤0.10 | – |
Titanium | Ti | – | ≤0.10 | – |
Iron | Fe | Balance | 53.0* | Rest |
*:norminal valves, they should be adjusted by the manufacturer so that the alloy meet the requirement for CTE in different temperature range |
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