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Tungsten Wire For Electric Light Source Filament
1. Description of Tungsten Wire For Electric Light Source Filament:
A tungsten bar is forged and drawn into tungsten wire to create a filament.
The main applications for tungsten wire include tungsten halogen lights and incandescent bulbs.The tungsten wire used for various luminous bodies in bulbs also needs to be doped with a small amount of potassium, silicon and aluminum oxides during the smelting process. This tungsten wire is called Doped Tungsten Wire, also known as Doped Tungsten Wire. Tungsten wire 218 or non-sagging tungsten wire (Non-sagTungstenWire).
Various drawing dies are typically used to draw tungsten wire. The production of filament and high-speed cutting alloy steel is the primary objective. These materials are also used to make optical and chemical instruments, among other things.
The resistivity of tungsten wire is 5.3*10^-8. Strong resistivity, low vapor pressure, high strength, and a high melting point are all characteristics of tungsten. Of all the pure metals, it is the one that produces incandescent filaments the best. However, processing tungsten is challenging because to its hardness and fragility. The resistance of the tungsten wire grows to a specific value when the current is heated to a particular temperature through it (generally, the resistance value of the metal wire increases with the increase of temperature). The tungsten wire processing technology that Coolidge developed in 1909, which was crucial in the development and marketing of incandescent light bulbs, is still in use today.
2. Grade and Chemical of Tungsten Wire For Electric Light Source Filament:
| W wire Grade | W content | Impurity element content | |
| Total content | content of each element | ||
| WAL1,WAL2 | ≥99.95% | ≤0.05% | ≤0.01% |
| W1 | ≥99.95% | ≤0.05% | ≤0.01% |
| W2 | ≥99.92% | ≤0.08% | ≤0.01% |
| Note: Potassium is not used as impurity content | |||
3. Size of Tungsten Wire For Electric Light Source Filament:
| Tungsten wire diameter(μm) | 200mm wire weight (mg) | 200mm Wire segment weight tolerance(％) | Diameter tolerance(％) | ||||
| 0 grade | Ⅰgrade | Ⅱ grade | 0 grade | Ⅰgrade | Ⅱ grade | ||
| 5≤d≤12 | 0.075~0.44 | － | ±4 | ±5 | － | － | － |
| 12< p=""> | >0.44~0.98 | － | ±3 | ±4 | － | － | － |
| 18< p=""> | >0.98~4.85 | ±2 | ±2.5 | ±3 | － | － | － |
| 40< p=""> | >4.85~19.39 | ±1.5 | ±2.0 | ±2.5 | － | － | － |
| 80< p=""> | >19.39~272.71 | ±1.0 | ±1.5 | ±2.0 | － | － | － |
| 300< p=""> | >272.71~371.79 | － | ±1.0 | ±1.5 | － | － | － |
| 350< p=""> | － | － | ±1.5 | ±2.0 | ±2.5 | ||
| 500< p=""> | － | － | ±1.0 | ±1.5 | ±2.0 | ||
4. Application of Tungsten Wire For Electric Light Source Filament:
Except for a small amount of tungsten wire used as a heating material for high-temperature furnaces, heaters of electron tubes and reinforcing ribs of composite materials, the majority of tungsten wires are used to create the electrodes for gas discharge lamps as well as the filaments for different types of incandescent and tungsten halogen lamps.
5. Tungsten wire lamp
The energy-saving lamp's two poles are simple tungsten wire. They are able to emit electrons after heating. To create an electric field, a reasonably high voltage is delivered to the light tube's both sides. In the light tube, these electrons will be accelerated to a specific speed and The mercury lamp tube is evacuated into a vacuum and filled with electrons, which causes the mercury atoms to be excited and transform into ions in an excited state when the electrons in the mercury electron flow hit them at a specific speed. For the step to take place, the excited state of mercury spontaneously falls back to its original state after a short time. At the same time, ultraviolet light is released, and ultraviolet light cannot be used for illumination. Common energy-saving lamps include ordinary ordinary lamps and tri-color lamps that are becoming mainstream, which have the advantage of saving electricity compared with incandescent bulbs. The difference is that the color rendering of ordinary lamps is low, while the three-color lamps show natural sunlight color, and are better than ordinary lamps in terms of color rendering and light efficiency. CFLs contain mercury. Because the boiling point of mercury is very low, it can be evaporated at room temperature. After the discarded fluorescent lamps are broken, mercury vapor is immediately released to the surroundings, and the mercury concentration in the surrounding air can instantly reach 10-20 mg per cubic meter. The air can only have a maximum concentration of 0.01 milligrams per cubic meter.Mercury is difficult to get rid of after entering the human body.
1. There is mercury pollution in the production process and after
use and disposal. Mercury contamination is highly valued in Western
nations.
2. Because it is a glass product, it is easily broken and difficult
to transport. Bad installation.
3. It still consumes too much electricity.
4. Easy to damage, short life, energy saving and not saving money
is the best portrayal of it.
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