Control of the nitrogen concentration in liquid lithium by the hot trap method

The nitrogen concentration in liquid lithium was controlled by the hot-trap method. Titanium, vanadium and a V–Ti alloy were used as nitrogen gettering materials. Gettering experiments were conducted at 673, 773 and 823 K for 0.4–2.8 Ms. After immersion, the nitrogen concentration increased in titanium and V–Ti were tested at 823 K. Especially the nitrogen gettering effect by the V–10at.%Ti alloy was found to be large. Nitrogen was considered to exist mainly as solid solution in the V–10at.%Ti alloy. The decrease of the nitrogen concentration in liquid lithium by the V–Ti gettering was also confirmed.