Interdiffusion coefficients in wüstite solid solutions containing CaO were measured by using a diffusion couple method at between 1073 and 1473K, in a controlled atmosphere for which the CO/CO2 ratio was equal to unity. It was found that the results could be described by:

D (m2/s) = 5.44 x 10-8 exp[-100100/RT]

Y.Iguchi, Y.Konishi, M.Inoue: Journal of the Japan Institute of Metals, 1986, 50[9], 818-21