- Contact Person : Ms. Han Cathy
- Company Name : Luoyang Sifon Electronic Co., Ltd.
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Kovar alloy
Kovar alloy
Type Analysis
Element | Min | Max |
Carbon | -- | 0.02 |
Nickel | -- | 29.0 |
Iron | Balance | |
Silicon | -- | 0.20 |
Manganese | -- | 0.30 |
Cobalt | -- | 17.0 |
Description
Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.
Applications
Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.This alloy has found wide application in power tubes, microwave tubes, transistors and diodes. In intergrated circuits, it has been used for the flat pack and the dual-in-line package.
Magnetic Properties
Kovar alloy is magnetic at all temperatures below the Curie point. Magnetic properties will depend upon heat treatment; the lower the hardness, the higher the permeability values and lower hysteresis loss. Examples of permeability properties are shown in the following chart:
Flux Density | Treatment | |
1830°F (999°C)30 min. - FCPermeability | 2010°F (1099°C)20 min. - FCPermeability | |
5001000200050001000012000 | 100014002000230034003000 | 1900350058001000082005000 |
Kovar alloy
