Pure Tungsten Wire
Pure tungsten wire refers to undoped tungsten wire produced from high-purity tungsten through powder metallurgy and multi-pass wire drawing processes, containing no or minimal alloying elements. Its primary composition is tungsten, with purity typically reaching ≥99.95%. Pure tungsten wire exhibits stable performance in high-temperature and vacuum environments due to tungsten’s inherently high melting point, low vapor pressure, and strong high-temperature strength.
1. Specifications of Pure Tungsten Wire
Dimensional specification is one of the key parameters in procurement and selection. The typical diameter range covers φ0.01 mm to φ3.0 mm. Ultra-fine sizes (φ0.01–0.1 mm) are mainly used in precision electronics and research applications, medium sizes (φ0.1–1.0 mm) are commonly used for heating and structural support, while coarse sizes (above φ1.0 mm) are mainly applied in high-temperature heating elements or special structural components. Diameter tolerance is generally controlled within ±1%, while ultra-fine specifications can be further controlled at the ±0.5 μm level. Diameter consistency and batch stability are critical, as they directly affect resistivity uniformity, heating consistency, and assembly compatibility.
2. Surface Condition of Pure Tungsten Wire
Tungsten wire is generally classified into black tungsten wire and cleaned tungsten wire. Black tungsten wire retains oxide films or graphite lubricant residues on the surface, appearing dark gray with relatively rough texture, and is suitable for general heating or structural applications. Cleaned tungsten wire undergoes cleaning or electrolytic treatment, resulting in a cleaner and brighter surface with fewer impurities and contaminants, making it more suitable for vacuum electronic devices or precision applications requiring high cleanliness. Selection should be based on whether the application involves vacuum conditions, high cleanliness, or electron emission requirements.
3. Applications of Pure Tungsten Wire
CTIA tungsten wire is widely used in lighting, electronics, high-temperature vacuum systems, and research applications due to its excellent high-temperature performance and physical stability. In the lighting industry, it is commonly used as filaments in incandescent and halogen lamps. In the electronics industry, it serves as emission or heating filaments in vacuum electronic devices such as electron tubes and cathode assemblies, utilizing its thermionic emission properties. In high-temperature equipment such as vacuum furnaces, evaporation coating systems, and electron beam heating systems, it is often used as a heating element or auxiliary structural component. It is also applied in research equipment, high-temperature sensing, and specialized structural support applications.
The performance of pure tungsten wire depends on the combined control of material purity, dimensional precision, and consistency in processing and surface treatment. Through continuous optimization of raw material purity, drawing processes, and surface condition, stable mechanical and electrical performance can be achieved across different applications. CTIA GROUP provides tungsten wire with various specifications and surface conditions according to application requirements, while maintaining control over dimensional accuracy and batch consistency to support stable performance in high-temperature, vacuum, and electronic applications.
For any inquiry, please contact tungsten wire manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
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