The impurity diffusion of 95Nb in CoO was measured in air by using the tracer-sectioning technique. The results, at 1001 to 1549C, could be described by:
D (cm2/s) = 4.93 x 10-2 exp[-48.12(kcal/mol)]
Cation Impurity Diffusion in CoO and NiO. K.Hoshino, N.L.Peterson: Journal of Physics and Chemistry of Solids, 1984, 45[8-9], 963-72
Table 60
Diffusion of Mg in CoO
Temperature (C) | PO2 (atm) | D (cm2/s) |
1005 | 2.1 x 10-1 | 2.7 x 10-10 |
1050 | 2.1 x 10-1 | 4.0 x 10-10 |
1062 | 1 x 10-5 | 9.0 x 10-11 |
1062 | 1.1 x 10-6 | 6.1 x 10-11 |
1098 | 2.1 x 10-1 | 9.6 x 10-10 |
1131 | 2.1 x 10-1 | 1.3 x 10-9 |
1200 | 2.1 x 10-1 | 2.8 x 10-9 |
1200 | 1 x 10-5 | 4.4 x 10-10 |
1200 | 2.65 x 10-3 | 1.1 x 10-9 |
1200 | 5.92 x 10-6 | 4.0 x 10-10 |
1200 | 2.04 x 10-6 | 3.4 x 10-10 |
1200 | 1.05 x 10-8 | 1.7 x 10-10 |
1220 | 2.1 x 10-1 | 3.3 x 10-9 |
1271 | 2.1 x 10-1 | 5.0 x 10-9 |
1340 | 1 x 10-5 | 1.9 x 10-9 |
1340 | 2 x 10-6 | 1.4 x 10-9 |
1347 | 2.1 x 10-1 | 1.0 x 10-8 |
1400 | 2.1 x 10-1 | 1.8 x 10-8 |
1455 | 4.65 x 100 | 2.3 x 10-9 |
1455 | 1 x 10-5 | 5.0 x 10-9 |
1500 | 2.1 x 10-1 | 3.8 x 10-8 |
1600 | 2.1 x 10-1 | 7.4 x 10-8 |