CERAMAX® - INCOMPARABLE HERMETIC
PROVIDING A HERMETIC SEAL THROUGH THE LIFE
OF YOUR PRODUCT
CERAMAX® is a dispersion-strengthened,
polycrystalline ceramic compound proprietary to SRI Hermetics
Devitrifying CERAMAX® compounds are very stable crystalline
materials that offer performance beyond the capabilities of
conventional glass seals. These ceramic compounds have
properties that enable them to be reheated to a very high
temperature without showing any flow or loss of seal integrity.
CERAMAX®-to-metal seal is accomplished by active chemical
bonding of the CERAMAX® compound to an oxide formed on
pin and case surfaces. Our products, using the CERAMAX® seal,
have incomparable performance in applications around the world.
SUPERIOR ELECTRICAL AND MECHANICAL PERFORMANCE
The CERAMAX® family has been formulated to seal a wide
range of materials, including stainless steel,
titanium, nickel-iron alloys, Inconel® and copper alloys.
Our direct sealing to copper alloy pins allows for much
greater electrical current carrying capability than conventional
glass seal technology. For example, a standard
.018 diameter copper alloy contact can carry up to 10 amps.
Our hermetic seals meet the requirements of MILSTD-
883 for hermeticity (=1x10-9 cc/sec He at one atmosphere ?P),
insulation resistance (>5,000 megohms at
500VDC) and dielectric withstanding voltage (no breakdown at
100VAC/mil CERAMAX®) – even in
nanominiature designs. Electrical breakdown always occurs in
the air across the CERAMAX® surface – never
within the CERAMAX® itself. CERAMAX® is chemically
resistant to all chemicals typically used in the hermetic
packaging and electronic systems integration industries. Although
the non-amorphous CERAMAX® structure is
not ideal for high frequency RF applications, the material
is well suited for high stress, DC applications.
CERAMAX® can typically be relied on to operate in a temperature
range of –269o to +450oC.
THE SUPERIOR TECHNOLOGY FOR YOUR APPLICATION
CERAMAX® has been used to provide superior hermetic
performance in many applications.
High-performance multi-pin electrical connectors for
aerospace and defense
Hermetic bulkhead feedthroughs for the harsh conditions
of oil exploration
Fiber optic feedthroughs for high-speed signal transmission
Thermal battery headers with high-conductivity pins
Feedthroughs for transducers such as accelerometers
Cryogenic applications such as thermal weapon sight