The tracer diffusivity of O was measured by means of secondary ion mass spectrometry.
The results for 1271 to 1573K (table 63) could be described by:
D (m2/s) = 8.76 x 10-8exp[-287(kJ/mol)/RT]
at an O partial pressure of 0.21atm.
S.Yamaguchi, M.Someno: Transactions of the Japan Institute of Metals, 1982, 23[5], 259-66
Table 62
Diffusion of 18O in CoO
Temperature (C) | D (cm2/s) |
1100 | 3.62 x 10-15 |
1200 | 5.68 x 10-14 |
1300 | 2.04 x 10-13 |
1400 | 3.55 x 10-12 |
1500 | 2.16 x 10-11 |