ThePipingMart Blog other Everything you need to know about Kovar sheet, plate and coils

Everything you need to know about Kovar sheet, plate and coils

What is a Kovar

It is an alloy primarily made of Iron, nickel, and cobalt that shares the same characteristics as heat-resistant glass in heat expansion. It frequently forms a gas seal when fused to the glass. The most crucial manufacturing property of Kovar has been its thermal expansion coefficient. The alloy is meticulously fabricated and controlled to achieve a coefficient of thermal expansion that is very similar to that of ceramic or hard glass (for example, borosilicate glass), indicating that it expands and contracts at the same rate.

  • Kovar Sheet: The Sheet is an alloy with controlled expansion. With a combination of 29% Nickel, 17% Cobalt, and the remaining balance of Iron, it is a nickel-iron alloy. Kovar is among the most desired controlled expansion alloys for hermetic sealing applications because of quality of extension matches both borosilicate glasses and alumina ceramics.
  • Kovar Coil: It is made with no porosity and is designed to ensure good deep drawing and machining qualities.
  • Kovar Plates: The joint can tolerate a wide temperature range since it not only has thermal expansion properties similar to glass but can frequently be designed with a nonlinear thermal expansion curve resembling glass.

Features of Kovar Sheets

  • Good quality impact & thermal shock resistance, which resists erosive wear
  • Resists oxidation & heat
  • Corrosion & abrasion tolerance
  • Resists galling & seizing

Kovar Plates’ features

  • Expansion Planning
  • Applications with hermetic sealing you may trust
  • Uniformity
  • The precise description of thermal expansion

Kovar Coil’s Benefits

It is suitable for industrial applications coupled with glass or ceramic materials, exceptionally when a hermetic seal should be maintained over a broad temperature range.

Major Advantages of Kovar

  • Kovar’s most significant mechanical property has been its thermal expansion coefficient. 
  • The alloy is deliberately crafted and managed to produce a coefficient of thermal expansion that is very similar to that of ceramic or hard glass (such as borosilicate glass), meaning that it expands and contracts at a comparable pace. 
  • It works perfectly in applications where glass or ceramic materials are included, primarily where a hermetic seal must be maintained across a wide temperature range. 
  • Metal and glass or ceramic are combined to produce various products. 
  • Because of its characteristics, Kovar has recently been selected as the preferred alloy for use in the aerospace industry. From absolute zero to extremely high heat, Kovar can resist rapid temperature changes without modifying or degrading structural stability.

Applications of Kovar

With the tougher Pyrex glasses and ceramic materials, Kovar alloy has been used to fabricate hermetic seals.

This alloy has a variety of applications in transistors, diodes, microwave tubes, and power tubes. It has been utilized for the flat pack and the dual-in-line package in electronic components.

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