Tungsten wires in vacuum tubes primarily serve as hot cathodes (thermal electron emission sources). By emitting thermal electrons through heating, they provide a stable operating current for the vacuum tube, supporting functions such as signal amplification, oscillation, rectification, and display.

The discovery and history of tungsten wires is a crucial chapter in the development of materials science and lighting technology, culminating in the efforts of numerous scientists and engineers.

Tungsten Wire Manufacturing Process:

1. Raw Material Preparation (Tungsten Powder Preparation)

Tungsten Ore Extraction: Tungsten trioxide (WO₃) or tungstate is extracted from tungsten ore (such as wolframite or scheelite).

Tungsten wire's unique chemical and physical properties make it widely used in light bulbs, electronic devices, and high-temperature industrial applications.