Cleaned Tungsten Wire refers to a filament made of tungsten metal. It is widely used in various industrial and scientific fields because of its high melting point (about 3422°C), high strength and good conductivity. The surface of cleaned tungsten wire is generally treated with alkali washing, showing a silver-gray metallic luster, so it is called "white tungsten wire".
1. The main characteristics of cleaned tungsten wire
High melting point: Tungsten is one of the materials with the highest melting point among known metals and is suitable for use in high temperature environments.
High strength: Tungsten wire has excellent mechanical strength, tensile resistance and wear resistance.
Good electrical and thermal conductivity: makes it suitable for electric light sources and other electronic devices.
Corrosion resistance: Tungsten has good corrosion resistance to most chemicals.
2. The main use of cleaned tungsten wire
Lighting industry: Cleaned tungsten wire is the core component of traditional incandescent lamps and halogen lamps, used as filaments because it can emit light at high temperatures.
Electronic equipment: used as emitters or heating elements in vacuum tubes, cathode ray tubes (CRTs), and other electronic devices.
High temperature industry: such as heating elements in high temperature furnaces, because they can withstand extreme temperatures.
Medical and scientific research: used as electron emission sources in equipment such as X-ray tubes and mass spectrometers.
3. Production process of tungsten filament
Tungsten filament is usually made by powder metallurgy process, including:
(1) extracting pure tungsten powder;
(2) pressing into rods or billets;
(3) forming tungsten rods by high temperature sintering;
(4) drawing the tungsten rods into filaments by wire drawing process;
(5) obtaining tungsten filaments after electrolytic cleaning and polishing.
