The use of doped tungsten wire can improve performance in many aspects. The following is a detailed analysis of these improvements:
- Improve low-temperature ductility
Due to the longitudinal fiber structure of the grains, the fracture behavior of doped tungsten wire belongs to intragranular fracture, and it usually has good ductility. Doping elements such as potassium (K) and aluminum (Al) can further improve the low-temperature ductility of tungsten wire, making its plastic-brittle transition temperature much lower than room temperature. This improvement in low-temperature ductility can well meet the requirements of tungsten wire winding and improve processing efficiency and product quality.
- Enhance mechanical properties
By doping specific elements, such as rare earth elements (such as lanthanum oxide, cerium oxide, neodymium oxide, etc.), the tensile strength and hardness of tungsten wire can be significantly improved. These improvements in mechanical properties make the doped tungsten wire more stable when subjected to external forces, less likely to break or deform, thereby extending its service life.
- Improve physical properties
Doped tungsten wire can also improve its physical properties, such as electrical conductivity and thermal conductivity. Certain doping elements can improve the electrical conductivity of tungsten wire, making the current transmission in the tungsten wire smoother and reducing energy loss. At the same time, the thermal conductivity of doped tungsten wire may also be improved, which helps to better dissipate heat and maintain the stable operation of equipment such as light bulbs.
- Improve chemical stability
The doping elements can also improve the chemical stability of tungsten wire, making it more corrosion-resistant. For example, doping cerium oxide can significantly reduce the corrosion rate of tungsten needles and improve their stability during use.
- Refine the grains and optimize the microstructure
The doping elements can refine the grains of tungsten wire and optimize its microstructure. Grain refinement is conducive to improving the mechanical and physical properties of the material, so that the doped tungsten wire can disperse stress more evenly when subjected to external force, reducing the possibility of stress concentration. At the same time, the optimized microstructure also helps to improve the overall performance stability of tungsten wire.
- Expansion of application fields
Due to the many advantages of doped tungsten wire mentioned above, its application field has also been expanded. For example, in the field of lighting, doped tungsten wire is widely used in halogen lamps, incandescent lamps and other lamps, which improves the luminous efficiency and service life of lamps. In addition, doped tungsten wire is also used in electron beam welding, vacuum electronic devices and other fields, and exerts its excellent performance characteristics.
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