酸化物陰極スリーブ中の不純物の拡散 (II)

抄録

Diffusion of activators in nickel sleeve, commonly used as oxide coated cathode, is studied. Diffusion of particular activator is found to be affected by the kind and amount of other elements included in the sleeve. Diffusion coefficient of magnesium becomes smaller with the increase of manganese, silicon or iron content, whereas, that of manganese becomes greater with the increase of magnesium content. It is inferred that the change in diffusion coefficient D may be attributed not to the change in activation energy E but to the change in D₀, these quantities being related one another by D=D₀exp (-E/kT).