1. Main Chemical Composition of Cleaned Tungsten Wire
Tungsten metal (W): Purity typically above 99.95% (e.g., grades WAL1, WAL2), serving as the base material for cleaned tungsten wire.
Impurity control: Total impurity content ≤0.05%, with individual impurity elements (such as Fe, Ni, Cu, etc.) ≤0.01%.
2. Possible Doping Elements in Cleaned Tungsten Wire
Potassium (K):
Function: Forms a “dovetail interlocking” grain structure, significantly improving high-temperature creep resistance.
Application: Doped tungsten wire (e.g., WR15) used in high-color-temperature, high-efficiency halogen incandescent lamps, compliant with EU export standards.
Rhenium (Re):
Function: Forms tungsten-rhenium alloys with tungsten (e.g., WRe3, WRe5, WRe20, WRe25, WRe26), enhancing high-temperature strength and creep resistance.
Application: Electron tube cathode filaments, binding materials for single-crystal sapphire growth.
Other elements:
Thorium (Th): Used in thorium tungsten wire to improve electron emission performance, suitable for electron tube cathodes.
Aluminum (Al), Silicon (Si): Assist in improving processing performance and high-temperature stability.
More details of tungsten wire, please visit website: http://www.tungsten-wire.com.cn/
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Email: sales@chinatungsten.com
Tel.: +86 592 5129595
