Solid-state electrochemical methods were used to study O diffusion at 850 to 1400K. The results could be described by:

D (cm2/s) = 4.9 x 10-2 exp[-164(kJ/mol)/RT]

J.W.Park, C.J.Altstetter: Metallurgical Transactions A, 1987, 18[1], 43-50