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Bent-Leg Tungsten Heater

A bent-leg tungsten heater is a tungsten heating element fabricated from single-strand or multi-strand high-purity or doped tungsten wire. The manufacturing process involves annealing and precision bending to shape both terminals into specific angles. This design is intended to interface with vacuum coating mounting fixtures and internal installation spaces, addressing various evaporation power requirements and equipment layouts.

(1) Made of high-purity tungsten material with purity ≥99.95%
(2) Melting point approximately 3420℃±20℃, suitable for high-temperature vacuum evaporation environments
(3) Stable electrical resistance with minimal fluctuation during heating
(4) Good high-temperature strength retention and strong creep resistance
(5) Low vapor pressure, minimizing contamination under high-vacuum conditions
(6) Bent-leg structure enables easy installation and stable mounting, improving equipment compatibility
(7) Customizable size and structural design
(8) Surface condition available as chemical cleaning or electrolytic polishing, reducing surface contamination
(9) Silver-white metallic appearance with uniform and consistent structure

4. Applications of CTIA’s Bent-Leg Tungsten Heater
As a thermal evaporation source, tungsten heaters are widely used in:
(1) Metal evaporation heating within vacuum deposition systems.
(2) Optical coating processes for lenses and display components.
(3) Surface metallization of plastic polymers such as ABS (Acrylonitrile Butadiene Styrene) and PP (Polypropylene).
(4) Functional thin-film deposition on metal and alloy substrates for conductivity or corrosion resistance.
(5) Industrial decorative vacuum coating applications.
(6) Laboratory-scale vacuum evaporation and material research simulations.

Within a high-vacuum environment, the tungsten heater reaches evaporation temperatures via resistive heating. The coating material undergoes phase transition into vapor atoms, which migrate through the chamber via line-of-sight transport. When the mean free path exceeds the chamber dimensions, these atoms condense on the substrate to form a thin film. The bent-leg structure provides spatial adaptability for specific equipment interfaces without altering the evaporation mechanism.

With over 30 years of experience in refractory metal fabrication, CTIA GROUP provides technical solutions for tungsten heater design and manufacturing. Based on thermal zone requirements and power specifications, parameters such as wire diameter, strand count, bending angles, leg spacing, and overall geometry are calibrated to match application needs. Combined with electrolytic polishing or chemical cleaning, CTIA GROUP manages the transition from metallurgical selection and structural design to the delivery of precision-manufactured products.

For any inquiry, please contact tungsten heater manufacturer: CTIA GROUP

Email: sales@chinatungsten.com

Tel: 0086 592 5129696 / 0086 592 5129595

Website: www.tungsten.com.cn

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4. Stranded tungsten wire for making tungsten heater