Annealed Graphite-Free Molybdenum Wire

1. Basic performance: physical co-performance of purity and flexibility

    Different from conventional "black molybdenum wire", this specially treated white molybdenum wire has the following core characteristics:

    Extreme cleanliness: The graphite coating is completely removed from the surface, showing a metallic silver-gray luster, ensuring an extremely low deflation rate under high temperature and vacuum.

    Excellent ductility: The "annealed state" endows molybdenum wire with excellent flexibility and elongation, making it difficult to break when winding micro coils or complex geometric shapes.

    High melting point stability: inherits the high melting point of molybdenum metal at 2623 °C, and has excellent tensile strength at high temperatures.

2. Chemical composition and technical indicators (Ultra-High Purity)

    We use high-purity molybdenum billets above 99.95% to ensure that the impurity content is strictly controlled within the PPM level.

Elongation: Depending on the diameter, it can reach 10%-25%.

3. Lean process: from physical cleaning to vacuum annealing

    The birth of each plate of clean molybdenum wire has gone through a process beyond the conventional:

    Hydrogen/electrolytic cleaning: Thoroughly peel off the remaining graphite coating from the drawing process through chemical or electrochemical methods.

    Continuous vacuum annealing: Continuous annealing in an ultra-high vacuum or high-purity hydrogen furnace not only releases processing stress, but also further removes internal gas impurities.

    Precision straightening: Ensure molybdenum wire has good straightness when unfolded, no dead pleats, suitable for automatic winding equipment.

4. Product specifications and basic parameters (Customizable)

    Diameter range (Diameter): 0.03 mm-2.0 mm (supports ultra-thin filament customization).

    Surface state: Silver gray metallic luster, no scratches, no visible pollutants.

    Packing: Vacuum sealed plastic tray to prevent secondary oxidation during storage.

    Implementation standard: ASTM B387 (Molybdenum and Molybdenum Alloy Wire Standard).

5. Surface treatment: the balance of bright surface and ultra-clean

    Alkaline washing/chemical polishing: Ensure that the surface is free of microscopic cracks and pits, and thermal radiation scattering.

    Ultrasonic cleaning: 100% removal of surface dust, up to the laboratory level use standards.

6. Core advantage: Why do senior thermal field designers specify to use "white molybdenum wire"?

    Non-Contamination risk: Removes the graphite layer (the main source of carbon), prevents carbon from reacting with residual oxygen in the vacuum chamber, and protects fragile oxide cathodes or semiconductor wafers.

   "Worry-free winding": the structure after annealing is uniform, the rebound is small when winding a tight coil, and the dimensional stability is excellent.

    Extremely fast bleeding: shortens the vacuum time of the vacuum system and improves production efficiency.

7. Application field: covering the most stringent scenarios

    High-end light sources and electronic tubes: manufacture cathode supports for power tubes, gate lines and lead-out lines for quartz lamps.

    Vacuum electric heating industry: As a vacuum furnace micro heating element, binding wire or thermocouple protective layer.

    Semiconductor and thin film technology: as electrodes or hooks in ion implanters and physical vapor deposition (PVD) devices.

    Medical devices: Manufacture of internal components for special X-ray tubes.