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Metallized Ceramic Components for Kovar Brazing

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Metallized Ceramic Components

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

– Complying with ROHS and REACH regulations
– Reliable quality, Non-toxic, healthy material, Eco friendly
– Professional ceramic R&D team is available for your requests of various metallized ceramic parts
Metallized Ceramic Components
Kovar alloy is a glass and ceramic sealing metal alloy, it has been used for hertmetic seals with the harder Pyrex glasses and alumina ceramic material.The expansion characteristics of Kovar match both glasses and alumina ceramics, making it one of the most popular controlled expansion alloys for hermetic sealing applications. Kovar is produced to ensure good properties for stamping ,machining and deep drawing, and is a porosity free product.
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

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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