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Tungsten is doped with between 1.0 and 2.0 percent of lanthanum oxide (La₂O₃) by weight in order to improve its creep resistance and increase the recrystallization temperature. WL is also easier to machine due to the finely distributed oxide particles in its structure. The electron work function of tungsten-lanthanum oxide is significantly lower than that of pure tungsten.
40 - 45 mm
300 - 3000 mm
18.65 - 18.75 g/cm³ at 20 °C
Available dimensions (diameter x length, mm x mm): 45 x 300-2400; 40-45 x 300-3000
Hardness, Vickers, 30HV 30
0.9 - 1.1 %
0.77 - 0.94 %
WL is a popular choice for ion sources, lamp electrodes and welding electrodes.
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This material data has been provided by Plansee.