The diffusion of cobalt in sintered samples of α-(Fe0.80Cr0.20)2O3 was measured in air at 1498 to 1673K. The diffusion was described by:

D(m2/s) = 9.8 x 105exp[-572(kJ/mol)/RT]

T.Tsuji, K.Tsumura, K.Naito: Journal of Nuclear Materials, 1986, 138[2-3], 215-21