The impurity diffusion of 95Zr in NiO was measured in air by using the tracer-sectioning technique. The results, at 1055 to 1600C, could be described by:

D (cm2/s) = 4.68 x 10-3 exp[-49.03(kcal/mol)]

K.Hoshino, N.L.Peterson: Journal of Physics and Chemistry of Solids, 1984, 45[8-9], 963-72