The conductivity of the tungsten needle refers to the tungsten needle’s ability to transmit electrical signals when current passes through the tungsten needle. Conductivity is one of the indicators to measure the conductivity of materials. It is usually expressed by the current through which carriers pass within a unit cross-sectional area.
The electrical conductivity of tungsten needles is high, second only to silver among metals, about 56×10^6 S/m (at room temperature). This means that when current is transmitted in the tungsten needle, the resistance is smaller and the conductivity is better. Additionally, tungsten needles maintain their conductivity properties at high temperatures, making them an ideal material for high-temperature applications.
In addition to electrical conductivity, tungsten needles also have the advantages of high thermal conductivity, high melting point and high density. These characteristics make tungsten needles widely used in many fields, such as light bulb filaments, electron tubes, and heating elements of high-temperature furnaces.
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