Tungsten filament

Approx. Rs 350 / PieceGet Latest Price

# Tungsten Basket Filaments

Tungsten basket filaments are precision-formed heating or emitting elements made from high-purity tungsten wire. Their basket-shaped geometry provides uniform temperature distribution, fast thermal response, and enhanced mechanical stability at extreme temperatures. These filaments are ideal for applications requiring compact size and high brightness or heat output.

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## Key Features

- Material 
  - 99.9 %–99.95 % pure tungsten for superior high-temperature performance 
  - High melting point (3,410 C) and excellent thermal conductivity 

- Design 
  - Basket (cage) shape delivers uniform heating/emission over a small footprint 
  - Customizable leg length, basket diameter, and wire gauge for application-specific requirements 

- Performance 
  - Operating temperature up to 2,500 C (in vacuum or inert atmosphere) 
  - Rapid ramp-up and cool-down times to reduce thermal cycling stress 
  - Long service life under moderate saturation conditions 

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## Typical Specifications

| Parameter                  | Value Range                |
|----------------------------|----------------------------|
| Wire Diameter              | 0.03 mm, 0.05 mm, 0.1 mm   |
| Basket Outer Diameter      | 2 mm – 10 mm               |
| Basket Depth               | 1 mm – 5 mm                |
| Number of Support Legs     | 4 – 8                      |
| Resistivity (20 C)        | ~4.5 μΩ·cm                 |
| Maximum Temperature        | 2,300 C – 2,500 C        |
| Typical Lifetime (vacuum)  | 500 – 1,000 hours          |

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## Applications

- Halogen and high-intensity discharge lamps 
- Electron microscopy (SEM/TEM) as cathode emitters 
- Infrared heating elements for scientific instrumentation 
- Miniature vacuum tubes and gas discharge devices 
- Aerospace and defense sensor heaters 

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## Packaging & Handling

- Individual filament assemblies in antistatic, foam-lined tubes 
- Sealed in inert gas or vacuum-packed pouches to prevent oxidation 
- Handle with ceramic-tipped tweezers; avoid direct contact with filament tips 
- Store in a dry, dust-free environment away from corrosive gases 

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Beyond these core details, you may want to explore:

- Custom shapes (spiral baskets, multi-tier cages) for specialized light distribution 
- Annealing treatments to relieve internal stresses and extend filament life 
- Comparative performance vs. helical or straight-wire filaments 
- Fixture and socket compatibility for seamless integration