The life of tungsten wires is closely related to current density, and this relationship is mainly reflected in the following aspects:
- The effect of current density on the temperature of tungsten wires
Tungsten wires will heat up and emit light after being energized, and their temperature will increase with the increase of current density. At high temperatures, tungsten wires will sublimate, that is, tungsten atoms escape from the surface of the tungsten wires and diffuse into the interior of the bulb, causing the tungsten wires to gradually become thinner, the structure to become weaker, and eventually may break. Therefore, the greater the current density, the higher the temperature of the tungsten wire, the faster the sublimation rate, and the shorter the life of the tungsten wire.
- The effect of current density on the physical properties of tungsten wires
As the current density increases, the electron bombardment of the tungsten wire will also increase. This will cause more defects and damage on the surface of the tungsten wire, thereby accelerating its aging and fracture process. In addition, excessive current density may also cause stress concentration and fatigue inside the tungsten wire, further shortening its life.
- Quantitative relationship between current density and tungsten wire life
Although there is no simple mathematical formula to accurately describe the relationship between current density and tungsten wire life, a qualitative or approximate quantitative relationship between them can be established through experiments and empirical data. Generally speaking, when the current density is low, the life of the tungsten wire is relatively long; when the current density is high, the life of the tungsten wire will be significantly shortened.
- Optimize current density to extend the life of tungsten wire
In order to extend the life of tungsten wire, the following measures can be taken to optimize the current density:
Choose appropriate bulb power: Choose appropriate bulb power according to actual needs, avoid using too much or too little power to reduce overheating or underheating of the tungsten wire.
Stabilize the power supply voltage: Keep the power supply voltage stable, avoid excessive voltage fluctuations that lead to drastic changes in current density, thereby reducing the impact and damage to the tungsten wire.
Adopt appropriate heat dissipation measures: By improving the heat dissipation structure of the bulb or adding heat sinks, the heat dissipation efficiency of the bulb can be improved, the working temperature of the tungsten wire can be reduced, and its life can be extended.
More details of tungsten wires, please visit website: http://tungsten.com.cn/tungsten-wires.html
Please contact CHINATUNGSTEN for inquiry and order of tungsten needles:
Email: sales@chinatungsten.com
Tel.: +86 592 5129595
