Ceramic Selection

The Right Ceramic for Your Particular Application

The Right Ceramic for Your Particular Application

If you need hermetic seals for specific applications, the technical information, guidelines and tips throughout the next several pages will help you select seal designs that are most efficient and competitively-priced. These data have been derived from the experiences of Specialty Seal Group engineering and production staff over more than 50 years of service to customers in a wide variety of industries.

After you have worked with us to establish the parameters for your seals, Specialty Seal Group’s state-of-the art capabilities in CAD design, CNC machining, sealing technology, mass spectrometer leak testing, and plating finishes will yield accurate, cost-effective results.

Cost vs. Alumina Content

As a rule, ceramic cost increases as the purity of raw Al2O3 increases. Specialty Seal Group excels at providing the strongest ceramic-to-metal seals and metallized ceramics with the lowest cost per alumina content possible.

Typically, 92-96% of Al2O3 ceramics prepared with Specialty Seal Group’s proprietary metallization process provide high performance where reliability and strength are critical. In addition, Specialty Seal Group ceramics promote increased thermal conductivity, chemical resistance and dielectric strength. H2SO4 and HCl, for examples, will not attack a ceramic, eliminating the probability of corrosion in a number of applications.

Those factors, along with alumina’s high temperature tolerance and high compressive strengths, make it the ceramic material of choice.

Typical Parameters of Ceramics in Specialty Seal Group Seals

Typical Composition

NOTE: All data tests completed to ASTM standards. Results are average for specimen tested and should be – but are not guaranteed to be – applicable to parts made of the material.

More Options from Specialty Seal Group

Ceramic-to-Metal Seals

Specialty Seal Group offers ceramic-to-metal seals for a wide range of uses including Single& Dual-Lead Seals, High-Temperature Feed thru Terminals and Specialty Seals.

Glass-to-Metal Seals

Glass-to-Metal Sealing Meets Challenges of the Most Demanding Applications. There are two types of glass seals available at Specialty Seal Group: Compression Seals and Matched Seals.

Specialty Seals

Producing Assemblies for Special Applications including capacitors, filters, transformers, microwave tubes, nuclear reactors and space probe devices.