Thoriated Tungsten Alloy Spooled Wire (W99/Th1)

Thoriated Tungsten Alloy Spooled Wire (W 99/Th 1) is designed for high-vacuum and high-temperature environments where stable electron emission and thermal durability are essential. It is widely used as a cathode material in vacuum tubes, ion sources, electron microscopes, and arc discharge systems. The incorporation of 1% thorium oxide enhances thermionic emission, reduces the work function, and improves arc-start consistency. These thorium oxide particles provide performance benefits while preserving tungsten’s high-temperature resilience. The spooled format allows for precise handling in automated setups, and the alloy’s resistance to recrystallization and mechanical degradation supports advanced applications in plasma systems, laboratory and fusion research, welding, and aerospace simulations.