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Ceramax The Best Hermetic Sealing Material

 

CERAMAX® - INCOMPARABLE HERMETIC PERFORMANCE

PROVIDING A HERMETIC SEAL THROUGH THE LIFE OF YOUR PRODUCT

CERAMAX® is a dispersion-strengthened, devitrifying, polycrystalline ceramic compound proprietary to SRI Hermetics Inc.

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. The CERAMAX®-to-metal seal is accomplished by active chemical bonding of the CERAMAX® compound to an oxide formed on the 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 and thermocouples
  • Cryogenic applications such as thermal weapon sight
     
         
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SRI Hermetics Inc. 3950 Dow Road Melbourne, FL 32934-9289 info@SRIHermetics.com Tel 321.254.4067 Fax 321.752.9221
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