Kovar Alloy Supply by Vulcan Metal Group

 

Kovar is a specific type of alloy known for its low coefficient of thermal expansion (CTE), making it particularly useful in applications where dimensional stability over a range of temperatures is crucial. Kovar is an iron-nickel-cobalt alloy with controlled expansion characteristics. Its chemical composition typically includes:

  • Iron (Fe): Around 54%

  • Nickel (Ni): Around 29%

  • Cobalt (Co): Around 17%

  • Trace amounts of other elements such as manganese, silicon, and carbon.

The name "Kovar" is derived from the first syllables of the main components—Ko for cobalt, Va for iron, and R for the Russian scientist Boris Vasilievich Romanov, who was involved in its development.

Key characteristics and applications of Kovar alloy include:

  • Low Coefficient of Thermal Expansion (CTE):

    • Kovar is designed to exhibit a low CTE, meaning that it expands or contracts very little with changes in temperature. This property is crucial in applications where dimensional stability is essential, particularly in electronics and telecommunications.

  • Hermetic Sealing:

    • Due to its low CTE, Kovar is often used in hermetic sealing applications, where it is necessary to create a tight seal between glass or ceramic components and the metal. This is commonly seen in the production of electronic packages, vacuum tubes, and certain types of sensors.

  • Electronic and Semiconductor Industries:

    • Kovar is widely used in the electronics and semiconductor industries, especially for components that require reliable performance over a range of temperatures. It is often employed in the production of integrated circuits, microwave tubes, and various electronic packages.

  • Glass-to-Metal Seals:

    • Kovar's compatibility with glass makes it suitable for glass-to-metal seals. This is advantageous in applications where a hermetic seal is necessary, such as in vacuum devices and electronic packaging.

  • Precision Machining:

    • Kovar can be precision-machined to achieve tight tolerances, which is important in applications where precise dimensions are critical.

  • Aerospace and Defense Applications:

    • Kovar is used in certain aerospace and defense applications where its thermal expansion characteristics and hermetic sealing properties are advantageous.

  • Scientific Instruments:

    • Kovar is utilized in the manufacturing of scientific instruments, such as certain types of sensors and detectors, where stable dimensions are required for accurate measurements.

The controlled expansion properties of Kovar make it a valuable material in applications where maintaining dimensional stability across a range of temperatures is essential. Its use is particularly prevalent in industries that demand high precision and reliability, such as electronics, telecommunications, and aerospace.



Location: 23888 Madison St, Torrance, CA 90505, USA

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