Hermetic Sealing with Induction

How does Metal-to-Glass Sealing with Induction Work?

Hermetic sealing is the process of creating a container that is airtight. It is commonly used to encase electrical mechanisms, as well as to contain functional gases.

Induction generates an electromagnetic field in a work coil that induces currents in the conductive material of a workpiece placed within or near the coil. Friction from these currents elevates the temperature of the workpieces to be heated.

Benefits of Using Induction Heating for Hermetic Sealing

Our induction heating systems provide hermetic sealing processes with reliable, repeatable, non-contact and energy-efficient heat, focusing heat to a specific area of the part.

Induction offers a process without open flame.

metal-glass sealing Application Notes

Select from our collection of metal-glass sealing notes, taken from years supporting our customers. Read how we helped to solve their process heating challenges.

image: Heating a Kovar Ferrule for Glass Soldering Heating a Kovar Ferrule for Glass Soldering

The solder formed a relatively uniform domed seal around the fiber despite the asymmetry of the open C coil. It took under 10 seconds to heat the part to soldering temperature

image: Soldering windows to time indicator housings Soldering windows to time indicator housings

Soldering soda lime glass metal edged windows to steel time

image: Hermetically sealing glass-enclosed resistors Hermetically sealing glass-enclosed resistors

Induction heating provides precise, consistent heat to very small parts resulting in repeatable, quality seals. By heating with medium frequency, arcing (which occurs at high frequencies) is avoided.

image: Soldering a kovar piece with glass to a copper base for a photon light source Soldering a kovar piece with glass to a copper base for a photon light source

Induction heating provides ability to use same equipment for both assembly and repair, hands-free heating that involves no operator skill for manufacturing, and uniform control of heat from part to part

image: Hermetic sealing: SS rods & glass preforms Hermetic sealing: SS rods & glass preforms

Induction melting provides hands-free heating that involves no operator skill for manufacturing, amounts of glass are precisely controlled by the glass preforms and even flow of glass creates aesthetically pleasing bond.

image: Repair of Glass Lined Tank Repair of Glass Lined Tank