The primary composition of black tungsten wire is pure tungsten (W, chemical element symbol) or tungsten alloys doped with small amounts of other elements. Specifically:
Main Composition:
- Tungsten: The core component of black tungsten wire is high-purity tungsten, typically with a purity of 99.95% or higher. Tungsten is widely used due to its extremely high melting point (approximately 3422°C), excellent mechanical strength, and good electrical conductivity.
Doping Elements (if applicable):
In some black tungsten wire production, small amounts of elements may be added to enhance performance (such as resistance to high-temperature deformation or ductility), including:
- Potassium (K): Improves the high-temperature creep resistance, commonly used in filament manufacturing.
- Aluminum (Al), Silicon (Si): Enhances wire-drawing performance or crystal structure.
- Rare Earth Elements (e.g., Lanthanum, Cerium): Increases high-temperature stability and oxidation resistance.
The doping amount is typically very small, usually constituting less than 0.1% of the total composition.
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